DH3 - Attempt to Generate DTC 122

Diagnostic Trouble Code (DTC) 123 indicates the Throttle Position (TP) sensor signal is greater than the Self-Test maximum value.

Possible causes are:

- TP sensor may not be seated properly (tightened down).

- Damaged TP sensor.

- Short to power in harness.

- Damaged Powertrain Control Module (PCM).

- Key "OFF".

- Disconnect TP sensor. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Rerun Key On Engine Off Self-Test. Quick Test Appendix (Detailed Testing Instructions)

- Is DTC 122 present (Ignore all other DTCs)?

Yes -- Go to DH4. DH4 - Check VREF Circuit Voltage

No -- Go to DH5. DH5 - Check TP Circuit For Shorts to Power