18560/P2128
From Ross-Tech Wiki
18560/P2128 - Accelerator Position Sensor 2 (G185): Signal too High
Possible Symptoms
- MIL on
- Reduced Power Output
Possible Causes
- Faulty Accelerator Pedal (very unlikely)
- Wiring Harness Issue
- Faulty ECM
- O2 Sensor(s)
Possible Solutions
- Inspect and test Wiring harness for Accelerator Pedal, see Repair Manual
- Visually inspect O2 sensors for damage
Special Notes
- O2 sensor issues can also cause the following DTCs:
- 16610/P0226 - Throttle Pedal Position Sensor (G79): Implausible Signal
- 18565/P2133 - Throttle Position Sensor Bank 2: Signal too High
- In some cases, O2 sensors will damage the ECM. Ross Tech suggest to replace O2 sensors before replacing an ECM for this type of issue.