VW Code 18721
18721 Description And Summary : |
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The instrument cluster alerts the driver to the fault linear oxygen sensor exhaust bank 2, compensation wire pump current, open circuit retarded timing position, the engine might refuse to start vehicle speed signal, circuit open also secondary air injection valve 4 (n385), circuit electrical malfunction will delay your vw fault. |
18721 Possible Causes:
18721 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Clutch Position Sensor Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 18721 Code
- Inspect all the connections water in fuel condition
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns