Symptoms
Symptoms may include:
- Irregular or low idle
- Stalling
- Surging
- No/little acceleration
- Other symptoms may also be present
Causes
A P212C code may mean that one or more of the following events have occurred:
- TPS not securely mounted
- Short circuit in 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 voltage at TPS (refer to your vehicle’s service manual for specific information). If voltage is too low, it indicates a problem. Replace if necessary.
If recently replaced, the TPS may need adjustment. On some vehicles, installation instructions require proper TPS alignment or adjustment, 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 wiring to ensure it’s not rubbing against anything, grounding, etc. The code may return.