Has anyone ever had this code flag up on diagnostics:
18047/P1639/005689 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal.
My Avant runs well (good service history, now on 140k) but has a slight hesitation now and again on brisk acceleration. At first I thought it may rev related as it is between 3k & 4k (I never go over 4k), but as this is the only fault code I have I beginning to think the two could be linked.
Could it be the case that the slight hesitancy might be to do with the pedal position during acceleration, and nothing at all to do with revs??
The Ross-Tech website thinks the following:
- Malfunction Indicator Light (MIL) ON
- Reduced Engine Output
- Wiring and/or connections faulty
- Faulty ECM
- Faulty Accelerator Pedal
- Check Measuring Block Readings for Accelerator Pedal
- Check Voltage Signals from ECM to Throttle Pedal (see factory repair manual)
- Check Wiring and Connectors from ECM to Accelerator Pedal
- There are 2 sensors in the accelerator pedal, both should increase in the same direction as the accelerator is pressed but they have different scales. This means one counts from 0 to 100, while the other one counts from 0 to 50.
- Accelerator Position Sensor faults can be caused by issues with the Oxygen Sensor(s) and it's wiring. Please verify this BEFORE replacing the ECM or Accelerator Pedal. Accelerator Pedal failure is very rare.
Any thoughts would be appreciated folks. The car runs great but this intermittent fault is frustrating!