Answers
Nov 11, 2023 - 07:19 AM
Since you have already replaced the fuel pump, fuel pressure sensor, and gas cap, and the issue persists, here are a few additional steps you could consider:
1. **Check Electrical Connections:** Ensure that all the electrical connections related to the fuel system, especially the fuel pressure sensor, are secure and free of corrosion.
2. **Inspect the EVAP System:** The P0452 code can also be related to the EVAP (Evaporative Emission Control) system. Check for any damaged hoses, loose connections, or leaks in the system.
3. **Fuel Filter:** If the fuel filter is clogged, it can prevent the engine from starting. Consider checking or replacing the fuel filter.
4. **Fuel Pressure Test:** Conduct a fuel pressure test to ensure the fuel pump is delivering the correct pressure to the engine.
5. **Check the ECU/PCM:** Sometimes, the issue could be with the Engine Control Unit (ECU) or Powertrain Control Module (PCM). They might need reprogramming or replacement.
6. **Professional Diagnosis:** If the problem persists, it might be worth getting a professional diagnostic. Sometimes, intermittent electrical issues or complex system faults can be challenging to diagnose without specialized equipment.
Nov 11, 2023 - 09:22 AM
Nov 13, 2023 - 09:36 AM
Hi there,
Since you have replaced the fuel pump and fuel pressure sensor. The problem might be with the ignition system. The parts affected are the spark plugs, ignition coils, and the ignition module. The other part you need to check is the throttle body. The air intake system should not be blocked and the throttle body should be checked if still in good condition. The lack of air or throttle issues can impact the air-fuel mixture. The last option to check is the engine control module (ECM). If it is not working properly the ECM will not be able to communicate well with the various engine components. Try to run a OBDII-scanner again to see if the results are consistent for any trouble codes showing up. I hope this helps!
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