1. Specific Meaning of Audi P1393

The P1393 code on Audi vehicles indicates:
“Camshaft Position (CMP) Sensor Circuit Performance Malfunction – Bank 1”

Audi Specifics:

• Primarily affects FSI, TFSI, and TDI engines
• Can disrupt the Variable Valve Timing (VVT) system
• Impacts engine performance and fuel consumption

2. Affected Audi Models

Model	Engine	Years	Critical Mileage
A4	2.0T FSI (EA888)	2008-2016	80,000-140,000 km
A6	3.0T TFSI (EA839)	2017-2023	60,000-100,000 km
Q5	2.0TDI (EA189)	2009-2017	120,000-180,000 km
A3	1.8T (EA888 Gen3)	2014-2020	70,000-120,000 km

3. Main Causes

A. Electrical Problems (70%)

• Faulty CMP sensor (Audi ref. 06F-907-311-C)
• Damaged wiring (critical area: engine harness routing)
• Oxidized connector (T14a/T17a)
• Power supply issue (voltage outside 4.5-5.5V)

B. Mechanical Problems (25%)

• Metal deposits on the tone wheel
• Excessive play in the camshaft
• Timing chain problem (stretching)

C. Other Causes (5%)

• ECU failure (rare)
• Electromagnetic interference
• Contaminated engine oil

4. Diagnostic Procedure

Step 1 – Initial Checks

1. Check oil level (VW 502/505 viscosity)
2. Visual inspection of CMP sensor and wiring
3. Check for associated codes (P0340, P0016, etc.)

Step 2 – Electrical Tests

Test	Method	Normal Values
Supply voltage	Multimeter (ignition ON)	5V ±0.5V
CMP resistance	Multimeter (disconnected)	500-1500 ohms
Output signal	Oscilloscope (VCDS ideal)	Clean square wave

Step 3 – Advanced Checks

1. CMP data analysis with VCDS/ODIS
2. Mechanical timing verification
3. Circuit continuity test to ECU

5. Specific Solutions

For EA888 (2.0T FSI)

• CMP sensor replacement (revised version)
• Harness inspection (common chafing area)
• ECU connector cleaning

For EA839 (3.0T TFSI)

• Timing adjuster verification
• Chain tension check
• Software update

For EA189 (2.0TDI)

• Tone wheel cleaning
• Oil pump verification
• CMP seal replacement

6. Technical Data

• Sensor torque: 9 Nm
• Inspection interval: 100,000 km
• Minimum oil pressure: 2.0 bar (hot idle)

7. Repair Costs

Service	Cost (EUR)	Warranty
Sensor replacement	150-300€	2 years
Wiring repair	200-500€	1 year
Audi diagnostic	90-180€	–

8. Mistakes to Avoid

• Using non-OEM sensors (40% failure rate)
• Neglecting wiring inspection
• Forgetting to reset adaptations

9. Technical FAQ

Q: Risk to the engine?
→ Possible VVT damage if ignored

Q: Can I drive temporarily?
→ Maximum 50 km at low RPM

Q: Difference between P1393 and P0340?
→ P1393 = performance issue, P0340 = open circuit

10. Post-Repair Procedure

1. Clear codes with VCDS
2. Perform break-in cycle:

• 20 min at 2000-2500 RPM
• 3 engine starts/stops

1. Check CMP parameters

11. Prevention Tips

• Strict oil changes (15,000 km max)
• Annual wiring inspection
• Use of specific Audi oil
• Connector cleaning every 2 years

12. Conclusion

To resolve P1393 on Audi:

1. Complete diagnosis with VCDS/ODIS
2. Thorough electrical verification
3. Use of Audi/VW OEM parts

⚠️ Important: Recurring problems often require full engine harness inspection. Consult a certified Audi technician for complex cases.

1. Meaning of Code Buick P1393

P1393 on Buick indicates:
“Intermittent problem with the camshaft position sensor (CMP) circuit – Bank 1”

Consequences:

• Engine light illuminated
• Performance degradation
• Risk of difficult starting

2. Affected Buick Models

Model	Engine	Years	Typical Mileage
Enclave	3.6L V6	2012-2017	130,000-190,000 km
Regal	2.0L Turbo	2011-2017	100,000-160,000 km
LaCrosse	3.8L V6	2005-2009	160,000-240,000 km
Encore	1.4L Turbo	2013-2022	80,000-140,000 km

3. Probable Causes

Electrical Problems (70%):

• Faulty CMP sensor (ref. GM 12677925)
• Damaged wiring (especially near the exhaust)
• Oxidized connector (X3 at ECM)
• Unstable supply voltage

Mechanical Problems (25%):

• Excessive camshaft play
• Stretched timing chain (3.6L)
• Dirt on the tone wheel

Others (5%):

• Outdated ECM software
• Grounding issue

4. Diagnostic Procedure

Step 1 – Visual Checks:

1. Check oil level
2. Inspect CMP sensor connector
3. Check wiring condition

Step 2 – Electrical Tests:

Test	Method	Normal Values
Supply voltage	Ignition ON	5V ±0.5V
CMP resistance	Sensor disconnected	500-1500Ω
Signal	Oscilloscope	Clean square signal

Step 3 – Mechanical Checks:

1. Check chain tension (3.6L)
2. Inspect tone wheel
3. Check oil pressure (>1.4 bar)

5. Repair Solutions

For 3.6L V6:

• Replace CMP sensor
• Check chain tensioner
• Clean ECM connector X3

For 2.0L Turbo:

• Inspect wiring near turbo
• Replace both sensors (intake/exhaust)
• Check PCV system

6. Technical Data

• Tightening torque: 10 Nm
• Sensor gap: 0.5-1.5mm
• Inspection interval: 100,000 km

7. Estimated Costs

Service	Cost (EUR)	Warranty
Sensor replacement	150-300€	2 years
Wiring repair	200-450€	1 year
Diagnostic	80-150€	–

8. Important Tips

1. Use only ACDelco sensors
2. Always check the entire wiring
3. Reset adaptations after repair

9. FAQ

Q: Can I drive with this code?
→ Limited to 50 km maximum

Q: Why prefer OEM parts?
→ Failure rate <5% vs >40% for generic parts

Q: Recommended prevention?

• Regular oil changes
• Annual wiring inspection
• Connector cleaning

10. Conclusion

To permanently resolve P1393:

1. Complete diagnostic with GM scanner
2. Thorough electrical verification
3. Use of original parts

⚠ Important: Consult a certified GM technician for recurring problems. 3.6L engines require special attention to chain tension.

1. Meaning of Code Cadillac P1393

The P1393 code on Cadillac indicates:
“Intermittent failure of the Camshaft Position (CMP) sensor circuit – Bank 1”

Immediate consequences:

• Illumination of the “Check Engine” light
• Possible engine performance limitation
• Risk of hard starting in cold weather

2. Affected Cadillac Models

Model	Engine	Years	Critical Mileage
CTS	3.6L V6 (LGX)	2016-2023	80,000-130,000 km
Escalade	6.2L V8 (L87)	2021-2023	50,000-90,000 km
XT5	2.0L Turbo (LSY)	2017-2023	60,000-100,000 km
ATS	2.5L I4 (LCV)	2013-2019	100,000-150,000 km

3. Main Causes

A. Electrical Problems (75%)

• Faulty CMP sensor (GM P/N 12677925)
• Damaged wiring (critical area: engine harness passage)
• Corroded CMP connector (frequent oxidation)
• Unstable power supply (4.5-5.5V required)

B. Mechanical Problems (20%)

• Excessive camshaft play
• Metal deposits on the tone wheel
• Timing issue (chain/ring)

C. Other Causes (5%)

• Partial ECM failure
• Software requiring update
• Grounding issue (G110)

4. Diagnostic Procedure

Step 1 – Initial Checks

1. Visual inspection of the sensor and connector
2. Check oil level (5W-30 Dexos2)
3. Search for associated codes (P0016, P0340)

Step 2 – Electrical Tests

Test	Method	Normal Values
Power supply voltage	Ignition ON	5V ±0.5V
CMP resistance	Sensor disconnected	500-1500Ω
Signal	Oscilloscope	Stable square signal

Step 3 – Advanced Checks

1. Data analysis with GDS2 scanner
2. Inspection of timing chain (3.6L)
3. Check oil pressure (>25 psi)

5. Solutions by Engine

For 3.6L V6 (LGX)

• Replace CMP sensor (improved version)
• Inspect chain tensioner
• Clean ECM connector X1

For 6.2L V8 (L87)

• Check wiring near exhaust manifolds
• Inspect AFM/DoD system
• ECM software update

For 2.0L Turbo (LSY)

• Complete CMP circuit inspection
• Check turbo and oil lines
• Clean connectors

6. Key Technical Data

• Tightening torque: 10 Nm
• Sensor gap: 0.8-1.6mm
• Inspection interval: 100,000 km

7. Repair Costs

Service	Cost (CAD)	Warranty
Sensor replacement	$200-400	2 years
Wiring repair	$300-600	1 year
Diagnostic	$100-180	–

8. Mistakes to Avoid

• Using non-OEM sensors
• Neglecting wiring inspection
• Forgetting to reset adaptations

9. Technical FAQ

Q: Risk to the engine?
→ Possible VVT damage if ignored

Q: Temporary driving possible?
→ Maximum 50 km at moderate RPM

Q: Difference with P0340?
→ P1393 = performance problem, P0340 = open circuit

10. Post-Repair Procedure

1. Clear codes with GDS2
2. Perform a break-in cycle:

• 20 min at 2000-2500 RPM
• 3 stop/starts

1. Check CMP parameters

11. Prevention Tips

• Strict oil changes (max 10,000 km)
• Annual wiring inspection
• Use Dexos2 oil
• Clean connectors every 2 years

12. Conclusion

To resolve P1393 on Cadillac:

1. Complete diagnostic with GDS2
2. Thorough electrical verification
3. Use GM Original parts

⚠ Important: Recurring problems often require a full engine harness inspection. Consult a certified Cadillac technician for complex cases.

Definition Chevrolet P1393

The Chevrolet P1393 code is an OBD-II diagnostic code that means “Crankshaft Position System Variation Not Learned”. This code primarily concerns General Motors (GM) vehicles, including Chevrolet models.

Possible Causes

1. Crankshaft Position Sensor Variation Not Programmed – The PCM (Powertrain Control Module) has not recorded the sensor’s variation values.
2. Problem with the Crankshaft Position Sensor (CKP) – Failure or malfunction.
3. Wiring Issues – Damaged wires, loose connectors, or corrosion in the CKP sensor circuit.
4. Mechanical Problems – Damage to the flywheel or reluctor ring (broken teeth or excessive wear).
5. Problem with the PCM – Software or hardware failure of the control module.

Common Symptoms

• Engine Hard to Start or frequent stalling
• Unstable Idle
• Loss of Power or reduced performance
• Check Engine Light (MIL) illuminated

Diagnosis and Repair

1. Check the CKP Sensor – Visually inspect and test its resistance.
2. Inspect Wiring and Connectors – Look for cut wires, short circuits, or corrosion.
3. Perform a Crankshaft Variation Learning Procedure (requires a GM/Chevrolet compatible diagnostic tool).
4. Scan the PCM – Check for other fault codes and live data from the CKP sensor.
5. Replace the CKP Sensor or Repair Wiring if necessary.

Important Note

Some Chevrolet models require a reset with a professional diagnostic tool (such as Tech2 or a compatible GM MDI tool) to properly record the crankshaft variation.

If the problem persists after these checks, it may be necessary to have the PCM inspected by a professional.

The Ford P1393 code has a different meaning than at Chevrolet/GM. At Ford, this code generally corresponds to:

Definition

P1393 – Camshaft Position (CMP) Sensor Circuit Range/Performance
This code indicates that the Powertrain Control Module (PCM) has detected an abnormal signal from the Camshaft Position (CMP) sensor.

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Possible Causes

1. Faulty CMP Sensor – The sensor is not providing a correct signal to the PCM.
2. Wiring or Connector Issues – Damaged wires, short circuits, poor contact.
3. Timing Problem – Incorrect synchronization between the camshaft and the crankshaft.
4. Reluctor (Toothed Wheel) Defect – Damaged or worn teeth on the CMP sensor wheel.
5. PCM Problem – Internal failure of the control module (rare).

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Common Symptoms

• Hard Starting Engine (especially when cold)
• Misfires or unstable idle
• Loss of Power and reduced performance
• Malfunction Indicator Lamp (MIL) illuminated

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Diagnosis and Repair

1. Check the CMP Sensor

• Resistance Test (if applicable, depending on the model).
• Visual Inspection (cracks, physical damage).
• Signal Check with an oscilloscope or diagnostic tool.

2. Inspect Wiring and Connectors

• Check the wires between the CMP sensor and the PCM.
• Look for short circuits, breaks, or corrosion.

3. Check Engine Timing

• If the timing belt has jumped or is misaligned, it can affect the CMP signal.

4. Replace the CMP Sensor if Necessary

• Some Ford models use magnetic or Hall effect CMP sensors.

5. Reset the PCM After Repair

• Clear the code and check if it returns.

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Important Note

On some Ford models (such as the Focus, F-150, Escape), a faulty CMP sensor can also trigger P0340 or P0345 codes.

If the problem persists after replacing the sensor, check:
✅ The sensor’s supply voltage (usually 5V or 12V depending on the model).
✅ The condition of the camshaft’s reluctor (toothed wheel).

Definition GMC P1393

P1393 – Crankshaft Position System Variation Not Learned
The Engine Control Module (ECM) has not been able to record the variation values of the Crankshaft Position Sensor (CKP). This is necessary for optimal engine operation.

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Possible Causes

1. Learning Procedure Not Performed – The ECM needs to be recalibrated after certain repairs.
2. Problem with the CKP Sensor – Failure, bad signal, or incorrect installation.
3. Damaged Wiring or Faulty Connectors – Short circuit, corrosion, or poor contact.
4. Mechanical Problem – Damaged teeth on the flywheel or reluctor ring.
5. ECM Failure – Rare, but possible in case of software or hardware issues.

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Common Symptoms

• Hard Starting (especially when hot)
• Unstable Idle or stalling
• Loss of Power and hesitant acceleration
• Malfunction Indicator Lamp (MIL) Illuminated

---

Diagnosis and Repair

1. Perform the CKP Learning Procedure

• Requires a compatible GM diagnostic tool (Tech2, Snap-On, Autel, etc.).
• The procedure varies by model (consult vehicle specifications).

2. Check the CKP Sensor

• Resistance Test (check specific values in the repair manual).
• Visual Inspection (cracks, damage, correct positioning).

3. Inspect Wiring and Connectors

• Check the wires between the CKP sensor and the ECM.
• Look for short circuits, breaks, or oxidation.

4. Examine the Flywheel/Reluctor Ring

• Check the condition of the teeth (no breaks or excessive wear).

5. Reset the ECM After Repair

• Clear the code and check if it returns after a drive cycle.

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Affected GMC Models

This problem can occur on various models, including:

• GMC Sierra (1500, 2500, etc.)
• GMC Yukon / Yukon XL
• GMC Canyon
• GMC Acadia
• Other vehicles with GM engines (e.g., Vortec, EcoTec, etc.)

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Important Note

• Some models require an advanced diagnostic tool to perform the CKP learning.
• If the code returns after repair, check:
  ✅ The CKP sensor supply voltage (typically 5V or 12V).
  ✅ The absence of mechanical issues (timing belt, synchronization).

Meaning of Honda P1393

The P1393 code on Honda vehicles typically indicates a problem with intermittency or mismatch between the signals from the crankshaft position sensor (CKP) and the camshaft position sensor (CMP).

Possible Causes

1. Faulty CKP sensor (crankshaft)
2. Faulty CMP sensor (camshaft)
3. Wiring issue or corroded/cut connectors
4. Timing problem (misaligned timing belt)
5. Reluctor fault (damaged gear wheel)
6. PCM issue (rare)

Common Symptoms

• Engine hard to start (especially when cold)
• Misfires at idle or during acceleration
• Unstable idle
• Noticeable power loss
• Check engine light on

Recommended Diagnosis

1. Check the CKP and CMP sensors

• Visual inspection (cracks, damage)
• Resistance measurement (compare with specific values)
• Signal analysis with an oscilloscope

1. Inspect the wiring

• Check continuity between sensors and PCM
• Look for short circuits or corrosion

1. Check the timing

• Verify alignment of timing marks
• Check the condition of the timing belt/chain

1. Examine the gear wheels

• Check for missing or broken teeth on the reluctors

Repair

• Replace the faulty sensor (CKP or CMP)
• Repair wiring if necessary
• Reset the timing if there is a synchronization issue
• Clear the codes and perform a road test

Affected Honda Models

This issue can occur on various Honda models, including:

• Civic
• Accord
• CR-V
• Odyssey
• And other models with F, K, or J series engines

Important note: Some Honda models require a specific relearn procedure after replacing the sensors. A diagnostic tool may be necessary for certain operations.

Meaning of Isuzu P1393 Code

The P1393 code on Isuzu vehicles typically indicates a problem with the crankshaft position (CKP) system, often related to an unperformed learning procedure or a faulty sensor.

Specific Interpretation

In Isuzu (often sharing GM technology), P1393 typically means:
“Crankshaft Position System Variation Not Learned”

Probable Causes

1. Unperformed learning procedure after replacing the CKP sensor or ECU
2. Faulty crankshaft position sensor (CKP)
3. Wiring problems (short circuits, breaks, corrosion)
4. Faulty flywheel (damaged teeth)
5. Engine timing problem
6. ECU failure (less common)

Common Symptoms

• Starting difficulty
• Unstable idle
• Loss of power
• Intermittent stalling
• Check engine light on

Diagnostic Procedure

1. Check the CKP sensor:

• Measure resistance (check specific values)
• Visual inspection
• Test signal with oscilloscope

2. Inspect wiring:

• Check continuity between sensor and ECU
• Look for short circuits to ground

3. Check flywheel:

• Check tooth condition
• Look for physical damage

4. Perform learning procedure:

• Requires compatible Isuzu diagnostic tool

Recommended Solutions

1. Perform CKP learning procedure (with scan tool)
2. Replace CKP sensor if faulty
3. Repair wiring if necessary
4. Check engine timing
5. Replace flywheel if teeth are damaged

Affected Isuzu Models

This code may appear on various Isuzu models, including:

• D-Max
• Rodeo
• Trooper
• NPR (diesel versions)
• Other models sharing GM platform

Important note: The exact reset procedure may vary depending on model and year. A professional diagnostic tool is often required to properly perform the CKP system learning.

Meaning of P1393 in Saab

The P1393 code in Saab vehicles (primarily those using GM platforms) generally indicates:
“Crankshaft Position (CKP) System Variation Not Learned”

This code means that the engine control module (ECM) was unable to store the crankshaft position sensor variation values, which are essential for optimal operation.

Main Causes

1. Learning procedure not performed after replacing the CKP sensor or ECM
2. Crankshaft position sensor (CKP) failure
3. Electrical issues:

• Damaged wiring or corroded connectors
• Short circuit or open circuit

4. Mechanical problems:

• Damaged teeth on the flywheel
• Excessive crankshaft play

5. Power supply issue (incorrect voltage to the sensor)
6. ECM failure (less common)

Common Symptoms

• Difficulty starting (especially when hot)
• Unstable idle
• Noticeable power loss
• Intermittent stalling
• Check engine light on
• Possible increase in fuel consumption

Diagnostic Procedure

1. Basic Checks

• Read all present fault codes
• Check recent repair history
• Visually inspect the CKP sensor and its connector

2. CKP Sensor Testing

• Measure resistance (compare with specifications)
• Check signal with an oscilloscope
• Verify power supply voltage (typically 5V or 12V)

3. Wiring Inspection

• Check continuity between sensor and ECM
• Look for short circuits to ground
• Inspect intermediate connectors

4. Mechanical Check

• Examine the flywheel (damaged teeth)
• Check crankshaft play
• Verify sensor alignment

Recommended Solutions

1. Perform the learning procedure:

• Requires a compatible Saab diagnostic tool (Tech2 or equivalent)
• Follow the model-specific procedure

2. Replace the CKP sensor if faulty:

• Use recommended OEM parts
• Properly position the sensor (correct air gap)

3. Repair wiring:

• Replace damaged wires
• Clean corroded connectors

4. Replace the flywheel if teeth are damaged

Affected Saab Models

This code may appear on:

• Saab 9-3 (GM platform)
• Saab 9-5
• Other models using GM engines

Technical Note: On some Saab models, this code may be accompanied by P0335 or P0336 in case of serious issues with the CKP system.

Prevention

• Always perform the learning procedure after any intervention
• Use quality OEM sensors
• Regularly check wiring condition

If the problem persists after these checks, further analysis with a professional diagnostic tool may be necessary to examine live data from the CKP system.

Suzuki P1393 Meaning

The P1393 code on Suzuki vehicles generally indicates a problem with the crankshaft position (CKP) system. More specifically, it often means:
“Crankshaft Position (CKP) Sensor Circuit Intermittent”

This code signals that the engine control module (ECM) has detected an intermittent or irregular signal from the crankshaft position sensor.

Common Causes

1. CKP Sensor Problem:

• Faulty or failing sensor
• Incorrect installation (excessive air gap)

1. Electrical Issues:

• Damaged wiring or loose connectors
• Short circuit or open circuit
• Connector corrosion

1. Mechanical Problems:

• Damaged teeth on the flywheel/tone wheel
• Sensor misalignment
• Excessive crankshaft play

1. Electromagnetic Interference Issue

Common Symptoms

• Hard starting (especially in cold/damp weather)
• Unstable idle
• Intermittent stalling
• Sudden power loss
• Check engine light illumination
• Random misfires

Diagnostic Procedure

1. Visual Inspection

• Check the physical condition of the CKP sensor
• Inspect the wiring and connectors
• Check the condition of the flywheel teeth

2. Electrical Tests

• Measure sensor resistance (compare to specifications)
• Check supply voltage (usually 5V or 12V)
• Check circuit continuity

3. Signal Analysis

• Use an oscilloscope to check the signal waveform
• Look for interruptions or anomalies in the signal

4. Mechanical Checks

• Check sensor alignment and gap
• Inspect the flywheel for missing/damaged teeth

Recommended Solutions

1. Replace the CKP sensor if faulty

• Use quality OEM parts
• Respect the tightening torque and air gap

1. Repair the wiring:

• Replace damaged wires
• Clean oxidized connectors
• Ensure proper insulation

1. Replace the flywheel if teeth are damaged
2. Reset the ECM after repair

Affected Suzuki Models

This code can appear on various Suzuki models, including:

• Swift
• Grand Vitara
• SX4
• Baleno
• Ignis
• Other models equipped with Suzuki engines

Important Tips

• Always check battery condition (low voltage can cause intermittent problems)
• Inspect the timing belt (poor synchronization can affect the CKP signal)
• Use a professional diagnostic tool for in-depth analysis

If the problem persists after these checks, it may be necessary to perform:

• Further analysis of live data
• A compression test to rule out other mechanical problems
• A complete check of the charging system and electrical ground