P2164
Throttle/Pedal Position Sensor B Maximum Stop Performance
Throttle/pedal position sensor B does not reach the calibrated maximum-stop value during the wide-open self-test. Sensor wear, mechanical stop misalignment, or a stuck pedal.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Common causes
Ordered by how often each turns out to be the cause.
- Sensor or mechanical stop wornCommon
Parts involved
- Throttle Position Sensor
- Accelerator Pedal Position Sensor
P2164 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.