P0220 Code: Throttle Position Sensor B Circuit Malfunction
🟠 Moderate severity · drivable
Yes, but the car may go into reduced-power limp mode with limited acceleration — get it checked soon.
What P0220 means
The throttle position sensor (or accelerator pedal position sensor) tells the computer how far the gas pedal is pressed and how far the throttle is open. This code means the sensor's B circuit has an electrical fault. When the computer can't trust the reading, it often limits engine power to a safe level.
Symptoms
- Check engine light on
- Reduced power or limp mode
- Poor acceleration
- Hesitation
- Rough idle
Common causes
- most common: Faulty throttle position sensor
- common: Damaged wiring or connector in the circuit
- less common: Carbon buildup on the throttle body
- rare: Engine computer (PCM) fault
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the throttle position sensor | Yes | $40–150 |
| Inspect and repair the wiring or connector | Yes | $20–100 |
| Clean the throttle body | Yes | $10–40 |
Frequently asked questions
Can I drive with a P0220 code?
Yes, but the car may go into limp mode with limited acceleration. Drive gently and have it fixed soon.
What does the B circuit mean in P0220?
Many throttle position sensors have two circuits that the computer compares. This code means the B circuit has an electrical fault.
How much does it cost to fix a P0220?
A new throttle position sensor is usually $40–150, and a wiring repair is typically $20–100.
Related codes
P0120
P0120 Code: Throttle Position Sensor Circuit
P0221P0221 Code: Throttle Position Sensor B Range/Performance
P0122P0122 Code: Throttle Position Sensor/Switch Circuit Low Input
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.