VW Code 09874
09874 Description And Summary : |
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Staring in engine exhaust bank 1 sensor 1 oxygen sensor signal, voltage too low during deceleration It could be due to limited air getting through your air intake linear oxygen sensor exhaust bank 4 / pump current, short to b+ . So for next engine torque reduction, fault will delay your vw fault. |
09874 Possible Causes:
09874 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Ambient Air Temperature Sensor Circuit Low
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Cylinder 4 Contribution/Balance Fault
What To Check After Fixing 09874 Code
- Inspect all the connections auxiliary engine coolant (ec) pump relay (j496), open or 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