What does it mean?
This diagnostic trouble code (DTC) is a generic powertrain code, meaning it applies to OBD-II equipped vehicles. Although generic, specific repair steps may vary by make/model.
A P0227 code means the vehicle’s computer has detected that the throttle position sensor (TPS) is reporting too low voltage. On some vehicles, this lower limit is 0.17 to 0.20 volts (V). The C refers to a particular circuit, sensor, or area of a particular circuit.
Did you adjust it during installation? If the signal value is below 0.17V, the PCM sets this code. This could be an open circuit or a short to ground in the signal circuit. Or you may have lost the 5-volt reference voltage.
Symptoms
Symptoms may include:
Rough or low idle
Stumbling
Surging
No/little acceleration
Other symptoms may also be present
Causes
A P0227 code can mean one or more of the following has occurred:
TPS not securely mounted
TPS circuit shorted to ground or another wire
Faulty TPS
Damaged computer (PCM)
Possible Solutions
Here are some recommended troubleshooting and repair steps:
Carefully inspect the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as needed
Check voltage at the 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 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 so, you should definitely check wiring to ensure it’s not rubbing against anything, grounding, etc. The code may return.