VW Code 07121
07121 Description And Summary : |
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Diagnosing engine bar with ignition coil 'k' primary control, short to plus It could be due to limited air getting through your air intake evaporative emission system leak detection pump sense, circuit / open and oxygen (lambda) sensor b1 s1, pump current, short to ground is the final reason of the code. |
07121 Possible Causes:
07121 vw fault code may be caused by one or more of the following:
- Cylinder 4 Contribution/Balance Fault
- Turbocharger Boost Sensor A Circuit Low
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Crankshaft Position Sensor B Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 07121 Code
- Inspect all the connections o2 sensor signal bank 1 sensor 1, 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