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.

Real-world scan data

Seen in

710

scans in the past year

Found in

0.1%

of scans

0.2%

of scans that found faults

Appears alongside · share of P0225 scans

P0226in 72.0% of scans

P2120in 69.6% of scans

P0657in 47.3% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P0225 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX