1. Specific Meaning for Cadillac P1392

The P1392 code on Cadillac vehicles indicates:
“Intermittent Mismatch Between Crankshaft Position Sensor (CKP) and Camshaft Position Sensor (CMP)”

This fault is particularly critical on Cadillac engines because it can affect:

• The Active Fuel Management system (AFM/DoD)
• Variable Valve Timing (VVT)
• Overall engine performance

2. Most Affected Cadillac Models

• CTS (2003-2019) – Especially 3.6L V6 (LLT/LFX)
• SRX (2004-2016) – Recurring problems on 2.8T/3.6L
• Escalade (2007-2020) – Frequent on 6.2L V8
• ATS (2013-2019) – Mainly 2.0T LTG

3. Prioritized Causes (Based on GM Technical Data)

1. CMP Sensor Failure (60% of cases)

• Particularly on 3.6L V6 (premature wear)

1. Timing Chain Problem (25%)

• Early stretching on LFX/LTG

1. Electrical Issues (10%)

• Corroded C100/C105 connectors

1. Control Module Failure (5%)

4. Advanced Diagnostic Procedure

Step 1 – Preliminary Check

• Check oil pressure (minimum 25 psi at idle)
• Inspect ECU X3 connector (known for corrosion issues)

Step 2 – Sensor Testing

Parameter	Normal Value	Test Method
CMP Resistance	850-1350Ω	Digital multimeter
CKP Signal	0.5-3.0V AC	Oscilloscope
Phase Delay	0-5°	GM MDI scan tool

Step 3 – Mechanical Verification

1. Use special tool J-45027 to measure chain stretch
2. Check variable cam tensioner (specific GM procedure)
3. Verify alignment marks (method varies by engine)

5. Technical Solutions by Engine

For 3.6L V6 (LLT/LFX)

• Replace complete timing chain kit (including revised tensioners)
• ECM software update (TSB 16-NA-383)

For 2.0T LTG

• Lubrication system overhaul
• Replacement with upgraded CMP sensor (P/N 12677925)

For 6.2L V8

• AFM system inspection
• Lifter verification

6. Critical Technical Data

• Timing Tolerance: ±3° max
• Minimum Oil Pressure: 25 psi (hot idle)
• Chain Replacement Interval: 150,000 km (but often needed at 100,000 km)

7. Average Repair Costs

Service	Cost (USD)	Warranty
CMP sensor replacement	$200-400	2 years
Complete chain kit	$1,800-3,500	1 year
Software update	$150-300	90 days

8. Common Workshop Mistakes

• Neglecting mandatory software updates
• Using non-OEM chain kits (causes recurrence)
• Forgetting to reset adaptives after repair

9. Technical FAQ

Q: Why is this code more serious on Cadillac?
→ Due to advanced systems (VVT, AFM) being more sensitive to timing errors.

Q: Can the repair be postponed?
→ Absolutely not – risk of catastrophic engine damage.

Q: How to prevent recurrence?
→ Use only GM Genuine parts and follow oil change intervals.

10. Technical Conclusion

The P1392 code on Cadillac requires:

1. Systematic diagnosis with GM MDI tool
2. Complete timing system verification
3. Update of relevant software

⚠️ Official GM Recommendation: Do not exceed 500 miles (800 km) after code appearance before repair.

1. Technical Interpretation (GM Specific) Chevrolet P1392

The P1392 code on Chevrolet vehicles is defined as:
“Crankshaft (CKP) and Camshaft (CMP) Signal Correlation Error – Intermittent Deviation”

Chevrolet Specifics:

• Directly affects the Active Fuel Management (AFM) system
• Impacts Variable Valve Timing (VVT) calculation
• May trigger “limp home” mode with engine speed limitation

2. Affected Models and Statistical Data

Model	Engine	Frequency	Typical Mileage
Silverado	5.3L V8	32% of cases	120,000-150,000 km
Equinox	2.4L LEA	25%	90,000-120,000 km
Cruze	1.4L LUJ	18%	60,000-100,000 km
Malibu	2.0T LTG	15%	80,000-110,000 km
Tahoe	6.2L L86	10%	150,000+ km

3. Diagnostic Decision Tree (Official GM Procedure)

1. Initial Check:

• Visual inspection of CMP connectors (often located on front valve cover)
• Power supply voltage measurement (12V ± 0.5V)

2. Dynamic Test:

• PID parameter analysis:
  • CMP_Adv (should be -5° to +5°)
  • CKP_RPM (correlation with tachometer)

3. Resistance Test:

• Expected values:
  • 3-wire sensor: 800-1400Ω (terminals A-B)
  • 2-wire sensor: 200-600Ω

4. Root Causes (Based on GM TSBs)

A. Mechanical Causes (45%)

• Chain stretch (specific to Ecotec engines)
• Premature wear of hydraulic tensioners
• Timing issue after engine reassembly

B. Electrical Failures (35%)

• Oxidation of C105/C110 connectors
• Partial short circuit in CMP wiring harness
• Unstable power supply (defective alternator)

C. Systemic Problems (20%)

• Outdated ECM software (requires reprogramming)
• Oil contamination affecting VVT solenoids
• Partial control module failure

5. Recommended Interventions by Engine

For 5.3L V8 (LC9/L83)

1. Replace complete chain kit (GM P/N 12640464)
2. Software update (TSB 18-NA-355)
3. AFM solenoid cleaning

For 2.4L LEA

1. Replacement with upgraded CMP sensor (P/N 12677925)
2. Inspection of variable cam tensioner
3. Complete oil change with Dexos2 oil

For 1.4L LUJ

1. Oil pump inspection (excessive play)
2. Timing check with J-45027 tool
3. Replacement of sensor seals

6. Critical Technical Data

• Timing Tolerance: ±6° max (vs ±3° for Cadillac)
• Minimum Oil Pressure: 22 psi (vs 25 psi for Cadillac)
• Sensor Resistance:
  • CMP: 750-1600Ω
  • CKP: 400-1000Ω

7. Costs and Warranties

Operation	Average Cost	Warranty Duration
Sensor replacement	$175-300	2 years/50,000 km
Complete timing kit	$950-2200	1 year/30,000 km
ECM reprogramming	$120-250	90 days

8. Common Workshop Errors

• Neglecting oil pressure check
• Forgetting to reset adaptation parameters
• Using non-original O-rings during replacements

9. Advanced Technical FAQ

Q: Why does this code often appear after oil change?
→ Oil viscosity change temporarily affecting VVT

Q: How to check chain stretch without disassembly?
→ GM method:

1. Engine at TDC cylinder 1
2. Measure deviation angle with scan tool
3. If >8°, replacement required

Q: Why prefer GM Original parts?
→ Aftermarket sensors have 38% failure rate vs 5% for OEM

10. Post-Repair Validation Procedure

1. Reset adaptives with GDS2 tool
2. Break-in cycle:
   • 20 minutes at 2000-2500 RPM
   • 3 stop/start cycles
3. Final parameter verification:
   • CMP_Adv between -3° and +3°
   • CKP_CMP_Delta < 2°

11. Professional Conclusion

Diagnosing P1392 on Chevrolet requires:

1. Systematic approach according to GM procedures
2. Complete timing system verification
3. Mandatory software update check

⚠️ Technical Alert: Engines with AFM system show 22% recurrence rate if repair doesn’t include software update.

1. Ford-Specific Technical Interpretation of P1392

The P1392 code on Ford vehicles is defined as:
“Crankshaft Position (CKP) / Camshaft Position (CMP) Signal Correlation – Intermittent Detection”

Ford Specifics:

• Directly affects the Ti-VCT (Twin Independent Variable Camshaft Timing) system
• May disable the VCT system, putting it into a fail-safe mode
• Significant impact on performance and fuel economy

2. Most Commonly Affected Ford Models

Model	Engine	Years	Frequency	Typical KM
F-150	3.5L EcoBoost	2011-2020	38%	120,000-180,000 km
Focus	2.0L Duratec	2012-2018	22%	90,000-140,000 km
Escape	1.5L EcoBoost	2017-2023	18%	60,000-100,000 km
Mustang	5.0L Coyote	2011-2023	12%	150,000+ km
Explorer	3.0L EcoBoost	2020-2023	10%	50,000-80,000 km

3. Diagnostic Decision Tree (Ford IDS Procedure)

Step 1 – Initial Checks:

1. Check oil level and quality (5W-30 viscosity recommended)
2. Visual inspection of CMP connectors (often located on each camshaft)
3. Check battery voltage (>12.6V engine off)

Step 2 – Advanced Tests:

• Measure PID parameters:
• VCT_Actual vs VCT_Desired (max deviation 5°)
• CMP_CKP_Sync (must be “Yes” continuously)
• Oscilloscope analysis of CKP/CMP signals

Step 3 – Mechanical Checks:

1. Compression test (max 15% variance between cylinders)
2. Timing chain inspection (Ford special tool 303-1229)
3. Check hydraulic tensioners

4. Root Causes (Based on Ford TSBs)

A. Mechanical Problems (50%)

• Timing chain stretch (3.5L EcoBoost – TSB 19-2367)
• VCT sprocket wear (5.0L Coyote)
• Oil pump issue (1.5L/2.0L EcoBoost)

B. Electrical Failures (30%)

• Faulty CMP sensors (2021 revision on EcoBoost)
• Wiring harness problem near exhaust manifold
• Corroded C175/C190 connectors

C. Systemic Issues (20%)

• Outdated PCM software (frequent updates required)
• Clogged VCT solenoids
• Faulty oil control valve

5. Engine-Specific Interventions

For 3.5L EcoBoost:

1. Complete timing chain kit (Ford P/N JL3Z-6A257-C)
2. PCM update (TSB 19-2367)
3. VCT solenoid replacement

For 2.0L Duratec:

1. Revised CMP sensors (P/N BV6Z-6C525-B)
2. VCT system cleaning
3. PCM reprogramming

For 5.0L Coyote:

1. VCT sprocket inspection (max axial play 0.3mm)
2. Complete phaser kit
3. Oil change with 5W-50 oil (performance)

6. Key Technical Data

• VCT Tolerance: ±5° (vs ±3° on GM)
• Minimum Oil Pressure:
• EcoBoost: 25 psi (hot idle)
• Duratec: 20 psi
• Sensor Resistances:
• CMP: 650-1300Ω (depending on generation)
• CKP: 200-800Ω

7. Costs and Warranties

Intervention	Average Cost	Ford Warranty
Sensor replacement	$150-350	2 years/unlimited km
Timing kit	$1,200-3,500	1 year/30,000 km
Reprogramming	$95-200	90 days

8. Common Workshop Mistakes

• Neglecting VCT solenoid checks
• Forgetting to reset VCT adaptation
• Using generic tools instead of IDS

9. Advanced Technical FAQ

Q: Why more frequent on EcoBoost?
→ Combination of high pressure/high temperatures accelerating wear

Q: Quick method for chain verification?

1. Scan with IDS tool
2. VCT_Deviation cold <8°
3. VCT_Deviation hot <12°

Q: Lifespan after repair?
→ 150,000+ km if using OEM parts and recommended oil

10. Post-Repair Validation

1. VCT learning procedure with IDS
2. Break-in cycle:

• 15 min at 2500 RPM
• 5 hard accelerations

1. Final verification:

• VCT_Error <3°
• CMP_CKP_Sync = Yes continuously

11. Specialist Recommendations

• Use Motorcraft oil exclusively
• Prefer complete Ford Performance timing kits
• Always perform PCM reprogramming after part replacement

Technical Alert: 2017-2019 EcoBoost models absolutely require secondary tensioner verification (TSB 20-2159) during intervention.

For accurate diagnosis, always:

1. Consult the most recent Ford TSBs
2. Use the IDS diagnostic tool
3. Follow workshop manual procedures to the letter

1. Meaning of GMC Code P1392

P1392 on GMC vehicles indicates an intermittent inconsistency between the crankshaft position (CKP) and camshaft position (CMP) sensors. This fault disrupts engine timing and can affect:

• Variable Valve Timing (VVT)
• The Active Fuel Management (AFM/DOD) system
• Performance and fuel consumption

2. Affected GMC Models

Model	Engine	Years	Typical Mileage
Sierra 1500	5.3L V8 (L84)	2019-2023	80,000-130,000 km
Acadia	3.6L V6 (LGX)	2017-2023	60,000-100,000 km
Canyon	2.8L Diesel (LWN)	2015-2023	70,000-120,000 km
Yukon	6.2L V8 (L87)	2021-2023	50,000-80,000 km

3. Main Causes

A. Mechanical Problems (45%)

• Stretched timing chain (especially 5.3L/6.2L)
• Worn tensioner or guides
• Variable phasing (VVT) issue

B. Electrical Failures (35%)

• Faulty CMP sensor (often on passenger side)
• Connector problem (corrosion on C101/C105)
• Damaged wiring near exhaust

C. Other Causes (20%)

• Insufficient/degraded engine oil
• Low oil pressure
• Outdated ECM software

4. Step-by-Step Diagnosis

Step 1: Initial Checks

1. Check oil level and quality
2. Visually inspect sensor connectors
3. Check for related fault codes (P0016, P0340, etc.)

Step 2: Electrical Tests

• CMP resistance: 750-1500Ω (varies by model)
• CKP signal: 0.5-3V AC during startup
• Wire continuity (resistance <1Ω)

Step 3: Mechanical Check

1. Timing mark alignment
2. Chain slack (GM special tool J-45027 recommended)
3. Condition of tensioners and guides

5. Recommended Solutions

For 5.3L/6.2L V8:

• Complete timing chain kit replacement (including new tensioners)
• ECM software update (TSB 18-NA-355)
• Cleaning AFM solenoids

For 3.6L V6:

• CMP sensor replacement (P/N 12677925)
• Timing actuator inspection
• Oil change with Dexos2 oil

For 2.8L Diesel:

• Oil pump check
• CMP/CKP sensor inspection (shielded version)

6. Key Technical Data

• Minimum oil pressure: 25 psi (hot idle)
• Timing tolerance: ±5°
• Chain interval: 150,000 km (but often at 100,000 km)

7. Estimated Costs

Service	Cost (CAD)	Warranty
Sensor replacement	$200-400	2 years
Complete chain kit	$1,500-3,000	1 year
Reprogramming	$100-250	90 days

8. Mistakes to Avoid

• Using non-OEM parts (high failure rate)
• Neglecting software updates
• Forgetting to reset adaptations after repair

9. FAQ

Q: Can I drive with this code?
→ No, risk of severe engine damage (especially with AFM)

Q: Why more frequent on recent GMCs?
→ Combination of thinner chains and complex VVT systems

Q: How to prevent this issue?

• Regular oil changes (every 5,000 km under severe use)
• Exclusive use of Dexos2 oil
• Annual inspections from 80,000 km

10. Conclusion

Code P1392 on GMC requires prompt attention:

1. Complete diagnosis with GM MDI tool
2. Thorough mechanical inspection
3. Use of genuine GM parts

⚠️ Important warning: Engines with AFM can suffer catastrophic damage if this code is ignored. Consult a certified GMC technician as soon as the check engine light appears.

1. Specific Meaning of Honda P1392

The P1392 code on Honda vehicles indicates:
“Misalignment between CKP (crankshaft) and CMP (camshaft) sensor signals – Intermittent error”

Technical characteristics:

• Directly affects the VTEC and VTC (Variable Timing Control) system
• Can cause engine RPM limitation (limp mode)
• Particularly sensitive on engines with timing chains

2. Affected Honda Models

Model	Engine	Years	Critical Mileage
Civic	1.5L Turbo (L15B7)	2016-2023	60,000-100,000 km
CR-V	1.5L Turbo (L15BE)	2017-2023	70,000-110,000 km
Accord	2.0L Turbo (K20C4)	2018-2023	50,000-90,000 km
HR-V	1.8L (R18Z9)	2015-2022	80,000-130,000 km

3. Main Causes (Honda TechLine Ranking)

A. Mechanical Problems (50%)

• Timing chain stretch (especially 1.5L Turbo)
• Hydraulic tensioner wear
• VTC system failure

B. Electrical Failures (40%)

• Faulty CMP sensor (Honda ref. 37550-RPY-003)
• Connector problem (oxidized terminals)
• Damaged wiring near exhaust manifold

C. Other Causes (10%)

• Inadequate engine oil (incorrect viscosity)
• Insufficient oil pressure
• ECU problem (requires reprogramming)

4. Official Honda Diagnostic Procedure

Step 1 – Initial Checks

1. Check oil level and quality (5W-30 recommended)
2. Visually inspect CMP connector (located on cylinder head)
3. Check associated codes (P0341, P0017, etc.)

Step 2 – Advanced Tests

• CMP resistance: 450-1000Ω (depending on model)
• CKP signal: 0.3-5V AC during startup
• VTC test with HDS (check advance angle)

Step 3 – Mechanical Check

1. Check timing marks alignment
2. Measure chain stretch (special Honda tool)
3. Check tensioner operation

5. Engine-Specific Solutions

For 1.5L Turbo (L15B)

• Complete chain kit (Honda ref. 14400-59B-010)
• Revised CMP sensor (2021+ version)
• Software update (TSB 21-041)

For 2.0L Turbo (K20C)

• VTC actuator inspection
• Seal replacement
• ECU reprogramming

For 1.8L (R18)

• CMP sensor replacement
• VTEC solenoid cleaning
• Oil pump verification

6. Key Technical Data

• Minimum oil pressure: 30 psi (hot idle)
• VTC tolerance: ±5° max
• Chain interval: 150,000 km (but check at 100,000 km)

7. Repair Costs

Service	Cost (EUR)	Warranty
Sensor replacement	150-300€	2 years
Complete chain kit	800-1,500€	1 year
Reprogramming	80-200€	90 days

8. Common Mistakes

• Using non-OEM parts (failure rate >40%)
• Neglecting oil pump check
• Forgetting to reset ECU after repair

9. Technical FAQ

Q: Can I drive with this code?
→ Not recommended – Risk of damaging VTC

Q: How to check chain without disassembly?

1. Engine at TDC #1
2. Measure VTC angle with HDS
3. If >8°, replacement needed

Q: Recommended prevention?

• Strict oil changes every 10,000 km max
• Exclusive use of Honda Ultra oil
• Annual inspection from 80,000 km

10. Conclusion

To solve P1392 on Honda:

1. Complete diagnosis with HDS tool
2. Thorough timing system check
3. Exclusive use of Honda parts

⚠️ Important: Recent Turbo engines require special attention to oil quality and pressure. Always consult a certified Honda technician for this type of fault.

1. Specific Meaning of Isuzu P1392

The P1392 code on Isuzu vehicles indicates:
“Intermittent misalignment between CKP (crankshaft) and CMP (camshaft) signals”

Technical specificities:

• Primarily affects common rail diesel systems (4JJ1, 4HK1)
• Can disrupt injection timing
• Risk of engine power limitation

2. Affected Isuzu Models

Model	Engine	Years	Critical Mileage
D-Max	4JJ1-TC	2011-2023	120,000-200,000 km
MU-X	4JK1-TC	2013-2023	100,000-180,000 km
NPR	4HK1-TC	2008-2023	150,000-250,000 km

3. Main Causes (Isuzu Technical Data)

A. Mechanical Problems (60%)

• Timing belt wear (4JJ1/4JK1)
• Automatic tensioner failure
• Excessive timing gear play

B. Electrical Failures (30%)

• Faulty CMP sensor (Isuzu ref. 8-94185-392-0)
• ECM connector problem (moisture/corrosion)
• Damaged wiring near engine block

C. Other Causes (10%)

• Timing issue after maintenance
• Partial ECU failure
• Insufficient oil pressure

4. Official Isuzu Diagnostic Procedure

Step 1 – Initial Checks

1. Check timing belt tension
2. Visually inspect CKP/CMP sensors
3. Verify engine oil level and quality

Step 2 – Electrical Tests

• CMP resistance: 800-1200Ω (at 20°C)
• CKP signal: 0.5-4V AC (during startup)
• Cable insulation test (>1MΩ)

Step 3 – Mechanical Checks

1. Verify timing mark alignment
2. Check tensioner pulley condition
3. Measure gear play

5. Engine-Specific Solutions

For 4JJ1-TC (D-Max)

• Complete belt kit (Isuzu ref. 8-97228-858-0)
• Upgraded CMP sensor (2020+ version)
• ECM connector cleaning

For 4HK1-TC (NPR)

• Complete timing system inspection
• Seal replacement
• Oil pump verification

6. Key Technical Data

• Belt tension: 50-60 N (new)
• Minimum oil pressure: 3 bar (hot idle)
• Belt interval: 90,000 km or 5 years

7. Repair Costs

Service	Cost (EUR)	Warranty
Sensor replacement	180-350€	2 years
Complete timing kit	600-1,200€	1 year
Electronic diagnostic	80-150€	–

8. Mistakes to Avoid

• Using non-genuine belt kits
• Neglecting tensioner pulley replacement
• Forgetting to purge system after service

9. Technical FAQ

Q: Is this code critical on Isuzu diesel?
→ Yes, can cause severe injection problems

Q: Can I drive while waiting for repair?
→ Not recommended – Risk of injection pump damage

Q: Recommended inspection frequency?

• Check every 30,000 km after 100,000 km
• Preventive belt replacement at 90,000 km

10. Conclusion

To resolve P1392 on Isuzu:

1. Complete timing system verification
2. Thorough electrical control
3. Use of genuine Isuzu parts

⚠️ Important: Isuzu diesel engines are sensitive to injection timing. Consult a certified Isuzu technician for this type of fault.

1. Specific Saab P1392 Interpretation

The P1392 code on Saab vehicles corresponds to:
“Desynchronization between the crankshaft position sensor (CKP) and camshaft position sensor (CMP) – Intermittent Error”

Saab Specifics:

• Particularly affects Turbo Ecopower engines
• Impacts the Trionic system (engine management)
• Can cause power loss and unstable idle

2. Affected Saab Models

Model	Engine	Years	Critical Mileage
9-3	B205 (2.0T)	1998-2011	120,000-180,000 km
9-5	B235 (2.3T)	1997-2009	100,000-160,000 km
9-3	Z19DTH (1.9TD)	2003-2011	150,000-220,000 km

3. Main Causes (Based on Saab TSBs)

A. Mechanical Problems (55%)

• Timing belt wear (especially on B205/B235)
• Automatic tensioner failure
• Excessive timing gear play

B. Electrical Failures (35%)

• Faulty CMP sensor (ref. Saab 55559281)
• DIC connector problem (Direct Ignition Cassette)
• Damaged wiring near the turbo

C. Other Causes (10%)

• Oil pressure problem
• Partial Trionic module failure
• Improperly timed belt after service

4. Complete Diagnostic Procedure

Step 1 – Initial Checks

1. Check timing belt tension
2. Visually inspect CMP sensor (located on exhaust side)
3. Check DIC condition and its connectors

Step 2 – Electrical Tests

• CMP resistance: 900-1100Ω (at 20°C)
• CKP signal: 0.5-3.5V AC (during startup)
• Continuity test of cables to ECU

Step 3 – Mechanical Checks

1. Check timing mark alignment
2. Check tensioner pulley condition
3. Measure camshaft axial play

5. Engine-Specific Solutions

For B205/B235 (Turbo Gasoline)

• Complete belt kit (including hydraulic tensioner)
• CMP sensor replacement (improved version)
• DIC contact cleaning

For Z19DTH (Diesel)

• Complete timing system inspection
• Oil pump verification
• Injector control

6. Key Technical Data

• Belt tension: 45-55 N (new)
• Minimum oil pressure: 2.5 bar (hot idle)
• Belt interval: 80,000 km or 5 years

7. Estimated Repair Costs

Service	Cost (EUR)	Duration
Sensor replacement	150-300€	1h
Complete timing kit	500-900€	4-6h
Electronic diagnosis	80-120€	1h

8. Common Mistakes to Avoid

• Using non-original belt kits
• Neglecting tensioner pulley replacement
• Forgetting to reset adaptation after repair

9. Expert Tips

1. For B205/B235:

• Prefer Gates or INA kits
• Systematically check water pump during belt change

2. For Z19DTH:

• Check belt tension every 30,000 km
• Use premium quality 5W-40 oil

3. Recommended tools:

• Tech2 or equivalent for diagnosis
• Torque wrench for pulley tightening

10. Technical FAQ

Q: Is this code critical on Saab?
→ Yes, can cause combustion problems and damage the turbo

Q: Can I drive temporarily?
→ Maximum 50 km at moderate RPM to reach a workshop

Q: Recommended prevention?

• Preventive belt change at 80,000 km
• Using quality synthetic oil
• Annual timing system inspection

11. Conclusion

To effectively resolve P1392 on Saab:

1. Thorough timing system verification
2. Complete electrical system control
3. Using original or equivalent quality parts

⚠️ Important: Saab Turbo engines are sensitive to timing. Intervention by a Saab specialist is strongly recommended. Always maintaining correct timing belt tension is crucial to avoid catastrophic engine damage.

1. Technical Meaning Suzuki P1392

The P1392 code on Suzuki vehicles indicates:
“Intermittent Correlation Error between Crankshaft Position (CKP) and Camshaft Position (CMP) Sensors”

Associated Issues:

• Engine timing disruption
• Unstable idle
• Risk of engine damage (on interference models)

2. Affected Suzuki Models

Model	Engine	Years	Critical Mileage
Swift	M16A/M18A	2005-2017	100,000-160,000 km
Grand Vitara	J20A/J24B	2005-2014	120,000-180,000 km
SX4	M16A	2006-2013	90,000-150,000 km
Baleno	K14C Boosterjet	2015-2020	60,000-100,000 km

3. Main Causes

A. Mechanical Problems (50%)

• Timing chain wear (especially on M16A/M18A)
• Hydraulic tensioner failure
• Excessive gear play

B. Electrical Failures (40%)

• Faulty CMP sensor (ref. Suzuki 13770-57J00)
• Connector problem (moisture/corrosion)
• Damaged wiring near exhaust manifold

C. Other Causes (10%)

• Insufficient oil pressure
• ECU problem
• Improperly tensioned accessory belt

4. Diagnostic Procedure

Step 1 – Initial Checks

1. Check oil level and quality (5W-30 recommended)
2. Visually inspect CKP/CMP sensors
3. Check for associated codes (P0016, P0340, etc.)

Step 2 – Electrical Tests

• CMP Resistance: 500-1000Ω (depending on model)
• CKP Signal: 0.5-3V AC (during startup)
• Continuity test of wires to ECU

Step 3 – Mechanical Checks

1. Check alignment marks
2. Measure chain stretch
3. Check tensioner operation

5. Solutions by Engine

For M16A/M18A (Swift/SX4)

• Complete timing chain kit (including revised tensioner)
• OEM CMP sensor
• Connector cleaning

For K14C Turbo (Baleno)

• VVT system inspection
• Oil pressure verification
• ECU reprogramming if necessary

6. Technical Data

• Minimum oil pressure: 2.8 bar (hot idle)
• Timing tolerance: ±5° max
• Chain interval: 150,000 km (check at 100,000 km)

7. Repair Costs

Service	Cost (EUR)	Duration
Sensor replacement	120-250€	1h
Complete chain kit	400-800€	4-5h
Diagnostic	60-100€	30min

8. Expert Tips

1. For M16A/M18A:

• Check chain tension every 50,000 km after 100,000 km
• Use INA or NTN chain kits

2. For K14C Turbo:

• Strict oil changes every 10,000 km
• Use 0W-20 synthetic oil

3. Recommended tools:

• Suzuki SDT scanner
• Chain tension gauge

9. Technical FAQ

Q: Can I drive with this code?
→ Not recommended – Risk of engine damage

Q: How to check the chain without disassembly?

1. Engine at TDC cylinder 1
2. Measure VVT angle with diagnostic tool
3. If >8°, replacement necessary

Q: Recommended prevention?

• Regular oil changes (max 10,000 km)
• Annual timing system inspection
• Use of OEM parts

10. Conclusion

To effectively resolve P1392 on Suzuki:

1. Complete diagnosis with appropriate tool
2. Thorough timing system verification
3. Use of quality parts

⚠️ Important: Recent Suzuki engines are sensitive to oil quality and chain tension. Early intervention prevents costly repairs. Consult a Suzuki specialist for accurate diagnosis.

1. Meaning of Code P1393

Code P1393 generally indicates:
“Camshaft Position (CMP) Sensor Circuit Problem – Range/Performance”

Key difference from P1392:

• P1392: CKP and CMP correlation problem
• P1393: Specific CMP circuit failure

2. Main Causes

A. Electrical Problems (70%)

• Faulty CMP sensor
• Short circuit or open circuit in wiring
• Corroded or loose connector
• Power supply issue (low voltage)

B. Mechanical Problems (20%)

• Physical damage to sensor
• Metal deposits on sensor
• Excessive camshaft play

C. Other Causes (10%)

• Control module (ECU) problem
• Electromagnetic interference
• Incorrect engine timing

3. Diagnostic Procedure

Step 1 – Basic Checks

1. Visual inspection of sensor and wiring
2. Check connectors for corrosion
3. Check engine oil level

Step 2 – Electrical Tests

Test	Method	Normal Values
Power supply voltage	Multimeter (ignition ON)	5V or 12V (depending on model)
Sensor resistance	Multimeter (sensor disconnected)	250-1000 ohms
Output signal	Oscilloscope (engine running)	Regular square signal

Step 3 – Advanced Checks

1. Sensor data analysis with diagnostic tool
2. Check mechanical timing
3. Wiring resistance test

4. Recommended Solutions

1. Replace CMP sensor (use OEM parts)
2. Repair wiring if necessary
3. Clean connectors
4. ECU software update (if applicable)

5. Frequently Affected Models

• Honda Civic (1.8L R18)
• Toyota Corolla (1.8L 2ZR-FE)
• Ford Focus (2.0L Duratec)
• Chevrolet Cruze (1.4L LUJ)

6. Repair Costs

Service	Average Cost (USD)	Duration
Sensor replacement	$80-$200	0.5-1h
Wiring repair	$100-$300	1-2h
Professional diagnosis	$50-$120	0.5h

7. Prevention Tips

1. Perform regular oil changes
2. Periodically inspect wiring
3. Use quality parts
4. Avoid aggressive engine washes

8. Technical FAQ

Q: Can I drive with a P1393?
→ Risky – Can cause starting and performance problems

Q: How to differentiate P1393 from P0340?
→ P1393 indicates a performance/range problem, P0340 a circuit problem

Q: Can an aftermarket sensor cause this code?
→ Yes, low-end sensors have a high failure rate

9. Reset Procedure

1. Fix root cause
2. Clear codes with OBD2 scanner
3. Perform verification drive cycle

10. Conclusion

Code P1393 requires a methodical approach:

1. Complete electrical verification
2. Mechanical inspection
3. Sensor and circuit testing

For lasting repair, it is recommended to:

• Use quality parts
• Thoroughly check wiring
• Consult a professional for complex diagnostics

Note: Exact specifications vary by vehicle model and year. Always consult your vehicle’s specific repair manual.

1. Specific Meaning of Acura P1393

The P1393 code on Acura vehicles indicates:
“Camshaft Position (CMP) Sensor Circuit Performance/Range Problem – Bank 1”

Differences from similar codes:

• P1391/P1392: CKP and CMP correlation issues
• P1393: Specific CMP circuit failure

2. Affected Acura Models

Model	Engine	Years	Critical Mileage
TL	3.2L V6 (J32A)	1999-2003	120,000-180,000 km
MDX	3.5L V6 (J35Y)	2007-2013	100,000-160,000 km
RSX	2.0L I4 (K20A)	2002-2006	90,000-150,000 km
RDX	2.3L Turbo (K23A)	2007-2012	80,000-140,000 km

3. Main Causes

A. Electrical Problems (75%)

• Faulty CMP sensor (ref. Acura 37550-RPY-013)
• Damaged wiring (especially near exhaust manifold)
• Oxidized connector (green terminal degradation)
• Power supply issue (voltage <4.5V or >5.5V)

B. Mechanical Problems (20%)

• Metal deposits on sensor target
• Excessive clearance in camshaft
• Timing issue after service

C. Other Causes (5%)

• PCM failure (rare but possible)
• Electromagnetic interference
• Contaminated engine oil

4. Diagnostic Procedure

Step 1 – Initial Checks

1. Check oil level and quality
2. Visually inspect CMP sensor and wiring
3. Check associated codes (P0340, P0341, etc.)

Step 2 – Electrical Tests

Test	Method	Normal Values
Power supply voltage	Multimeter (ignition ON)	4.5-5.5V
CMP resistance	Multimeter (sensor disconnected)	400-1000 ohms
Output signal	Oscilloscope (engine running)	Regular square signal

Step 3 – Advanced Checks

1. CMP data analysis with HDS scanner
2. Mechanical timing verification
3. Wiring continuity test to PCM

5. Specific Solutions by Engine

For J-Series (V6)

• CMP sensor replacement (revised version)
• CMP harness inspection (critical area: firewall passage)
• PCM connector cleaning

For K-Series (I4)

• CMP seal check (frequent oil leaks)
• VTC pulley control
• PCM reprogramming if necessary

6. Key Technical Data

• CMP supply voltage: 5V ±0.5V
• Preventive replacement interval: 150,000 km
• Sensor tightening torque: 10 Nm (K-series) / 12 Nm (J-series)

7. Repair Costs

Service	Cost (USD)	Warranty
Sensor replacement	$120-$250	2 years
Wiring repair	$150-$400	1 year
Professional diagnosis	$80-$150	–

8. Common Mistakes

• Neglecting CMP seal inspection
• Using non-OEM sensors (failure rate >35%)
• Forgetting to check power supply voltage

9. Technical FAQ

Q: Can this code cause hard starting?
→ Yes, PCM may mismanage injection without valid CMP signal

Q: Can I reset the code without repair?
→ No, the code will return as long as the problem persists

Q: Difference between P1393 and P0341?
→ P1393 = performance problem, P0341 = circuit problem

10. Post-Repair Procedure

1. Clear codes with HDS scanner
2. Perform driving cycle:

• 10 min at constant speed (60-80 km/h)
• 3 complete stops/starts

1. Verify code does not return

11. Prevention Tips

1. Regular oil changes (every 10,000 km max)
2. Annual CMP wiring inspection
3. Use of premium synthetic oil
4. Periodic connector cleaning

12. Conclusion

To permanently resolve P1393 on Acura:

1. Complete diagnosis with HDS scanner
2. Thorough electrical verification
3. Replacement with Acura/Honda OEM parts

⚠️ Important: Recurring CMP problems on Acura often require thorough inspection of wiring and connectors. Consult a certified Acura technician for complex diagnostics.