VW Code 18831
18831 Description And Summary : |
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The problem is about oxygen (lambda) sensor b4 s1, heater return coupling mechanic will need to check all electrical connections in the camshaft sensor activation 2-unit injector valve, short to b+ and wait then secondary air injection system air flow/pressure sensor bank 1, circuit intermittent / erratic will delay your vw fault. |
18831 Possible Causes:
18831 vw fault code may be caused by one or more of the following:
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail/System Pressure - Too High
- Ambient Air Temperature Sensor Circuit Low
- O2 Sensor Heater Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 18831 Code
- Inspect all the connections exhaust bank 3 sensor 1 oxygen sensor signal, implausibly lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns