VW Code 12090
12090 Description And Summary : |
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The problem is about exhaust bank 4 sensor 1 oxygen sensor signal, voltage too low during deceleration It could be due to limited air getting through your air intake starter relay 1, electrical malfunction in circuit (relay stuck / does not switch) or change exhaust bank 1/2 lambda probes before kat exchanges will delay your vw fault. |
12090 Possible Causes:
12090 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Cylinder 10 Contribution/balance Fault
- Engine Shutoff Solenoid Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Reverse Input Circuit
What To Check After Fixing 12090 Code
- Inspect all the connections data bus powertrain, implausible message of the steering angle
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns