OBD-II Code P1351 Explained: Peugeot 1.6 HDi, GM, Ford, Holden & Mitsubishi
The P1351 code is a diagnostic trouble code (DTC) that indicates a fault in the ignition control or glow plug preheating circuit, depending on the vehicle. While it is most commonly reported in Peugeot 1.6 HDi and Citroën diesel engines in the UK and Europe, it also appears in GM and Ford gasoline models in the US, and Holden/Mitsubishi vehicles in Australia.
Table of Contents
1. What Does P1351 Mean?
In Peugeot 1.6 HDi and Citroën diesels, P1351 refers to a glow plug preheating relay circuit fault. In GM, Ford, and Holden models, it often relates to ignition control system malfunction.
2. Symptoms
- Check Engine Light (CEL) illuminated
- Poor cold starts (common in Peugeot 1.6 HDi)
- Rough idle or misfires
- Reduced acceleration
- Higher emissions
3. Common Causes
- Faulty glow plugs (Peugeot/Citroën diesel)
- Failed ignition coil (GM, Ford, Holden)
- Defective glow plug relay
- Corroded or damaged wiring
- Faulty Engine Control Module (ECM)
4. Severity of the P1351 Code
While P1351 will not usually cause immediate engine failure, ignoring it can lead to hard cold starts, reduced fuel economy, and long-term engine wear. In diesel models, prolonged issues can damage the DPF (Diesel Particulate Filter).
5. Can I Still Drive with the P1351 Code?
Yes, you can still drive, but it’s not recommended for long periods. In Peugeot 1.6 HDi, the car may run normally once warm, but repeated cold starts will strain the system. In GM/Ford gasoline vehicles, misfires could worsen and cause catalytic converter damage.
6. How to Solve P1351
- Scan the vehicle with a professional tool (iCarsoft CR MAX).
- Check glow plugs and relays (Peugeot 1.6 HDi).
- Inspect ignition coils and wiring (GM, Ford, Holden).
- Repair corroded connections.
- Replace faulty components.
- Clear the code and recheck.
7. How Much Does It Cost to Repair?
- Glow plugs: $100–$250 (Peugeot/Citroën)
- Ignition coil replacement: $150–$400 (GM/Ford/Holden)
- Relay replacement: $80–$150
- Labor: $100–$300 depending on region
8. How to Clear the P1351 Code?
After repairs, the code can be cleared with a professional OBD-II scanner such as the iCarsoft CR MAX. Clearing the code without fixing the fault will cause it to reappear.
9. How to Prevent P1351?
- Regular maintenance of ignition/glow plug systems
- Check wiring and connectors for corrosion
- Use high-quality fuel to prevent carbon buildup
- Run diagnostic scans during routine servicing
10. Real-World Cases
Many Peugeot 307 and 407 1.6 HDi owners report P1351 after cold weather. On forums like Peugeot Forums, drivers mention that faulty glow plugs or relays are the main culprits.
In the US, some Chevrolet Malibu owners have reported P1351 linked to failing ignition control modules, leading to stalling and CEL illumination.
11. Best Diagnostic Tools
Professional-grade tools like the iCarsoft CR Eagle and CR MAX help:
- Read and clear P1351 accurately
- Test glow plug circuits and ignition coils
- Monitor live data
- Verify repairs
12. FAQ
Q1: How serious is the P1351 code?
It’s moderately serious. The vehicle may still run, but cold starts and performance will be affected.
Q2: Can I fix the P1351 problem myself?
Yes, if you have basic tools. Glow plugs and ignition coils can be DIY replaced. However, ECM issues require a mechanic.
Q3: How much does it cost to repair P1351?
Between $150 and $500 depending on the faulty part and region.
Q4: How can I clear the P1351 code?
Use a professional OBD-II scanner like iCarsoft CR MAX.
Q5: How do I prevent P1351 from recurring?
Regular maintenance, checking glow plugs/ignition coils, and scanning with tools like iCarsoft.
Related Articles：
P1351 Ignition Coil Control Circuits in Peaugot
KBB explains P1351 as abnormal voltage in ICM/IDM circuits; good overview for GM/Ford interpretation. Kbb.com
Chevy/GMC real-world case: 1997 Tahoe reporting “ICM circuit high voltage” with P1351 after wet weather. tahoeyukonforum.com
ScannerDanner case: P1351 fixed by replacing the ICM; immediate start success.
13. Conclusion
The P1351 code is common in Peugeot 1.6 HDi (UK/EU), GM & Ford (US), and Holden/Mitsubishi (Australia). It usually indicates a fault in the glow plug relay circuit or ignition control system. With proper diagnostics and tools like the iCarsoft CR Eagle, you can identify and fix the issue efficiently, ensuring smooth performance and reliable cold starts.
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