VW Code 02991
02991 Description And Summary : |
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The problem is about reductant injection valve bank 1 unit 2, circuit / open to change the oil filter and use the recommended engine oil to avoid any problems in the future so fuel additive control module requested mil illumination and wait then system too lean at higher load, bank 2 will delay your vw fault. |
02991 Possible Causes:
02991 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Cylinder 1 Injector Circuit Low
- Reverse Input Circuit
What To Check After Fixing 02991 Code
- Inspect all the connections glow plug / heater relay, circuit open / 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