P0228 — Throttle/Pedal Position Sensor/Switch C Circuit Low Input
Drive with caution — fix soon.
What P0228 means
This code means the third throttle or pedal position sensor (sensor C) is sending a voltage signal that's too low for the conditions. It's commonly caused by a faulty sensor, a short to ground in the wiring, or a corroded connector dragging the voltage down. Fixing it usually involves testing and replacing the sensor or repairing the wiring, and it's typically a straightforward repair.
Common symptoms
- Check engine light is on
- Engine enters reduced-power or limp mode
- Sluggish or delayed throttle response
- Rough idle or stalling
- Uneven or surging acceleration
Common causes
- Faulty throttle/pedal position sensor (C circuit)
- Short to ground in the signal wiring
- Corroded or damaged sensor connector
- Open or broken sensor reference voltage wire
- Faulty throttle control module
Typical repair cost
$120 – $400
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0228 code?
Short trips are usually fine, but the car may go into reduced-power mode. Since throttle response is affected, it's best to get it checked soon rather than driving on it long-term.
How much does it cost to fix a P0228 code?
Repairs typically range from $120 to $400. Replacing the throttle position sensor is the most common fix, while wiring or connector repairs can vary the price.
Is a P0228 code serious?
It's moderately serious. The car may still drive, but unreliable throttle behavior is a safety concern, so it shouldn't be left unaddressed.
What does 'low input' mean in this code?
It means the sensor's signal voltage is lower than the computer expects. This usually points to a short to ground, a failing sensor, or a connector problem rather than a mechanical fault.