Audi DTC P1502 – Fuel Pump Relay Circuit Short to B+
DTC P1502 meaning on Audi
The Diagnostic Trouble Code (DTC) P1502 for Audi indicates a fault in the fuel pump relay circuit where there is a short to battery positive (B+). This means that there is an unintended connection between the fuel pump relay circuit and the positive battery terminal, which can lead to various issues related to the fuel pump operation.
Audi DTC P1502 symptoms
Symptoms of DTC P1502 on an Audi may include:
- Engine stalling or not starting
- Loss of power while driving
- Fuel pump not priming
- Check Engine Light (CEL) illuminated on the dashboard
Audi DTC P1502 causes
The common causes of DTC P1502 on an Audi are:
- Short circuit in the fuel pump relay circuit
- Wiring harness issues
- Faulty fuel pump relay
- Corrosion or poor connections in the circuit
Audi DTC P1502 seriousness
The seriousness of DTC P1502 on an Audi depends on the driving conditions and the extent of the issue. Ignoring this fault can lead to potential safety hazards and may leave you stranded if the fuel pump fails completely. It is recommended to address this issue promptly to avoid further complications.
How to diagnose DTC P1502 on Audi
To diagnose DTC P1502 on an Audi, follow these steps:
- Use an OBD-II scanner to retrieve the fault code
- Inspect the fuel pump relay and related wiring for any visible damage or corrosion
- Check the fuel pump relay operation using a multimeter
- Test the continuity and resistance of the circuit to identify any short to B+
How to fix DTC P1502 on Audi
To fix DTC P1502 on an Audi, you can:
- Replace the faulty fuel pump relay
- Repair or replace any damaged wiring in the circuit
- Clean any corrosion or poor connections in the circuit
- Ensure proper routing and insulation of the wiring harness
How to erase DTC P1502 on Audi
To erase DTC P1502 on an Audi, you can:
- Use an OBD-II scanner to clear the fault code
- After fixing the underlying issue, drive the vehicle to allow the system to perform a self-check and verify the repair
- If the fault does not reoccur, the DTC should be automatically erased from the system
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