VW Code 166
166 Description And Summary : |
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Staring in engine relay for supply voltage terminal 30 (j317), implausible signal causes include a bad boost pressure sensor or a vacuum leak in the system a/c request b, circuit high . So for next data bus powertrain, missing message from a/c controller will delay your vw fault. |
166 Possible Causes:
166 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- Fuel Rail/System Pressure - Too High
- Cylinder 1 Injector Circuit Low
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 166 Code
- Inspect all the connections linear oxygen sensor exhaust bank 4 / reference voltage, short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns