DTC P1478 Audi
EVAP Emission Control LDP Circuit Clamped Tube Detected
EVAP Emission Control LDP Circuit Clamped Tube Detected
Description
Key on, KOEO Self-Test enabled, and the ECM detected an unexpected voltage condition on the EVAP emission control leak detection pump circuit.
Cause and Solution
Leak Detection Pump has failed
EVAP canister system has an improper or broken seal
Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
Hoses between the fuel pump and the EVAP canister are faulty
Fuel filler cap is loose
Fuel pump seal is defective, faulty or otherwise leaking
Hoses between the EVAP canister and the fuel flap unit are faulty
Hoses between the EVAP canister and the evaporative emission canister purge regulator valve are faulty
Video Guide
Diagnostic Info
- DTC Code: P1478
- Brand: Audi