Symptoms
Symptoms may include:
- Irregular or low idle
- Stalling
- Surging
- No/little acceleration
- Other symptoms may also be present
Causes
A P2127 code may mean that one or more of the following events have occurred:
- TPS not securely mounted
- Short circuit of TPS circuit to ground or another wire
- Faulty TPS
- Damaged computer (PCM)
Possible Solutions
Here are some recommended troubleshooting and repair steps:
Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace if necessary
Check the voltage at the TPS (refer to your vehicle’s maintenance manual for specific information). If the voltage is too low, it indicates a problem. Replace if necessary.
If it has been recently replaced, the TPS may need to be adjusted. On some vehicles, installation instructions require the TPS to be properly aligned or adjusted, consult a repair manual for details.
If there are no symptoms, the problem may be intermittent and clearing the code may temporarily resolve the issue. If this is the case, you should definitely check the wiring to ensure it is not rubbing against anything, grounding, etc. The code may return.