VW Code 15143
15143 Description And Summary : |
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Staring in engine o2 sensor signal bank 1 sensor 3, biased / stuck rich It could be due to limited air getting through your air intake secondary air injection valve 4 (n385), circuit open circuit you can see the activation glow plug control module, electrical malfunction is the final reason of the code. |
15143 Possible Causes:
15143 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Fuel Rail Pressure Sensor Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Glow Plug/Heater Circuit 'A' Malfunction
- Injector Circuit Malfunction - Cylinders
- Crankshaft Position Sensor A Circuit Malfunction
- Cold Start Injector 1 Malfunction
What To Check After Fixing 15143 Code
- Inspect all the connections manifold absolute pressure / mass air flow - throttle position correlation at idle
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns