P0225
Throttle/Pedal Position Sensor/Switch C Circuit
Throttle / pedal position
Generic OBD-II
High
What it means
P0225 means the ECM has seen a problem with the "C" signal from the throttle-position or accelerator-pedal-position sensor. Modern drive-by-wire systems use redundant sensor signals to cross-check pedal and throttle position, and when one goes out of range the ECM usually cuts power to a safe limp mode until it is repaired.
High
Can I keep driving? You can usually still drive, but the car may drop into reduced-power (limp) mode with a sluggish throttle — go gently and get it fixed soon.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced engine power or limp mode
- Hesitation, surging, or unstable idle
- Poor or unresponsive throttle response
Common causes
Most likely first
- Faulty throttle-position or accelerator-pedal-position sensor (the C signal)Likely
- Damaged wiring or corroded connector in the sensor circuitCommon
- Poor ground or a bad 5-volt reference to the sensorCommon
- Drive-by-wire throttle body faultLess often
- ECM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for companion throttle/pedal codes (P0220-P0224).
- Inspect the sensor connector and wiring at the throttle body or pedal for damage and corrosion.
- Backprobe the sensor for its reference voltage, ground, and a smooth signal sweep.
- Test and replace the sensor or throttle body if the signal is out of range.
- If wiring and sensor check out, evaluate the ECM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0225?+
Only cautiously. The car often falls into limp mode with limited power, and an erratic pedal signal can make throttle response unpredictable — get it repaired promptly.
Can I just clear P0225?+
It will come back once the sensor or wiring fault is present again. Fix the circuit rather than clearing the code.
Related codes
Often seen with P0225
Read & clear P0225 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX