P01D1
Cylinder 4 Injection Timing Performance - Over Retarded
P01D1 is an OBD-II diagnostic trouble code meaning: Cylinder 4 Injection Timing Performance - Over Retarded. Common causes: worn or clogged injector of cylinder 4, malfunction of the fuel rail pressure regulator. Estimated repair cost: $56–333.
Symptoms
- Reduced engine power and thrust
- Black or blue smoke from the exhaust pipe
- Increased fuel consumption
- Unstable engine operation
- Check Engine Light Illuminates
Causes
- Worn or clogged injector of cylinder 4
- Malfunction of the fuel rail pressure regulator
- Camshaft or crankshaft position sensor failure
- Mechanical wear of the injection pump drive
- Malfunction of the injection timing actuator
How to Fix
- Read and record all active error codes
- Check the pressure in the fuel rail
- Carry out diagnostics of the injector of cylinder 4 on the stand
- Check signals from camshaft and crankshaft position sensors
- Check the mechanical condition of the injection pump drive
- If necessary, replace the nozzle or adjust the injection angle
Related codes
Error P01D1 by Vehicle Brand
FAQ
What does the P01D1 code mean?
P01D1 is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Injection Timing Performance - Over Retarded
What causes a P01D1 error code?
The most common causes of P01D1 include: Worn or clogged injector of cylinder 4; Malfunction of the fuel rail pressure regulator; Camshaft or crankshaft position sensor failure; Mechanical wear of the injection pump drive.
How do I fix a P01D1 diagnostic trouble code?
To fix P01D1: Read and record all active error codes. Check the pressure in the fuel rail. Carry out diagnostics of the injector of cylinder 4 on the stand. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P01D1?
Yes, but get it checked soon
How much does it cost to fix P01D1?
The estimated repair cost for P01D1 is $56–333. Actual cost depends on your vehicle, location, and labor rates.
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