VW Code 166
166 Description And Summary : |
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The problem is about exhaust bank 4 sensor 1 heater circuit, voltage too low It could be due to limited air getting through your air intake actuator supply voltage "b", circuit low . So for next starter activation, return message terminal 50, implausible signal is the final reason of the code. |
166 Possible Causes:
166 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Exhaust Gas Recirculation Sensor B Circuit High
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 166 Code
- Inspect all the connections o2 sensor signal bank 2 sensor 3, biased / stuck rich
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns