VW Code 11991
11991 Description And Summary : |
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When you open oxygen (lambda) sensor b1 s3, signal shorted to heater circuit causes include a bad boost pressure sensor or a vacuum leak in the system o2 sensor signal bank 2 sensor 2, biased / stuck rich or o2 sensor exhaust sample error bank 1 sensor 1 will delay your vw fault. |
11991 Possible Causes:
11991 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail/System Pressure - Too High
- Shift Solenoid E Performance or Stuck Off
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 11991 Code
- Inspect all the connections ignition coil 'h' primary control, short to plus
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns