Throttle Position Sensor Performance
Throttle Position Sensor is out of range or not functioning correctly.
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 Throttle Position Sensor (TPS) tells the engine computer how far the throttle plate is open. If it doesn't send the right signal, the computer can't manage air and fuel properly, causing performance issues.
What the computer is actually seeing
The computer expects the TPS to produce a voltage signal between 0.5V (closed throttle) and 4.5V (wide open throttle). If the signal is above or below this range, it throws a fault code.
What a healthy reading looks like
TPS voltage should be between 0.5V to 4.5V with a smooth transition as the throttle is actuated.
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 throttle position sensor wiring and connectors for damage or corrosion.
- 2Inspect the throttle plate for carbon build-up or obstruction.
- 3Test the TPS output voltage at closed throttle; should read around 0.5V. If not, replace the TPS.
- 4Check the full range voltage at wide open throttle; should be close to 4.5V. If it's not, check for mechanical issues or replace the TPS.
Common causes
- Faulty throttle position sensor
- Wiring issues or connector problems
- Faulty engine control module (ECM)
- Mechanical issues with the throttle body
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but performance may be poor, and you could experience stalling or acceleration issues.
Will the code come back after clearing it?
If the underlying issue isn't fixed, the code is likely to return.
Why does this code relate to other throttle-related codes?
Throttle position sensor performance is critical for proper engine operation, and failures often accompany each other.
Working a real vehicle right now?
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