Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem
The throttle position sensor B is not reading correctly, affecting throttle control.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The car's computer measures how far the gas pedal is pressed through two sensors (A and B). If the readings from sensor B don't match what the computer expects, it triggers this code, indicating a problem with the sensor or its wiring.
What the computer is actually seeing
The PCM sees inconsistent readings from the throttle position sensor B compared to the expected range, often in millivolts.
What a healthy reading looks like
Sensor B should read between 0.5V (closed throttle) and 4.5V (full throttle).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the wiring and connectors for sensor B for any visible damage or corrosion.
- 2Inspect the other components and connectors in the throttle system for any faults.
- 3Use a multimeter to check the voltage at the throttle position sensor B - it should be between 0.5V and 4.5V under normal conditions.
- 4If the voltage is outside this range, replace the throttle position sensor B and retest.
- 5If the sensor is good, check the PCM for proper functionality and any related issues.
Common causes
- Faulty throttle position sensor B
- Wiring issues or open circuits
- Connector problems or corrosion
- Poor ground connections
- Throttle body contamination or failure
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally not safe as it can lead to erratic throttle response.
Will this code come back after resetting?
It might come back if the underlying issue isn't resolved.
Why is this code related to other throttle position codes?
These codes often indicate similar issues with throttle control systems implementing multiple sensors.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →