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
- Check oil level and quality (5W-30 recommended)
- Visually inspect CKP/CMP sensors
- 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
- Check alignment marks
- Measure chain stretch
- 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
- For M16A/M18A:
- Check chain tension every 50,000 km after 100,000 km
- Use INA or NTN chain kits
- For K14C Turbo:
- Strict oil changes every 10,000 km
- Use 0W-20 synthetic oil
- 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?
- Engine at TDC cylinder 1
- Measure VVT angle with diagnostic tool
- 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:
- Complete diagnosis with appropriate tool
- Thorough timing system verification
- 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.