Throttle Position Sensor 1 Circuit
Issue detected with the throttle position sensor circuit.
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 system is having trouble reading where the throttle is positioned, affecting engine performance.
What the computer is actually seeing
The engine control module (ECM) sees a range of voltages from the throttle position sensor (TPS) that indicates the throttle's opening angle; should be between 0.5V (idle) and 4.5V (full throttle).
What a healthy reading looks like
TPS voltage should range from 0.5V to 4.5V, and must change smoothly as the pedal is pressed.
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.
- 11. Check for any visible damage to the wiring and connectors of the throttle position sensor—repair if found.
- 22. Using a multimeter, measure voltage at the TPS connector while moving the throttle. Confirm it ranges from 0.5V to 4.5V without any dropouts.
- 33. If the voltage is incorrect, replace the throttle position sensor. If the voltage is correct, proceed to check the ECM for faults.
Common causes
- Faulty throttle position sensor
- Damaged wiring or connectors
- Poor electrical connection in the TPS circuit
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you can drive, but performance may be degraded. Address it soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does it pair with other SPN codes?
Related SPN codes often indicate issues in the same system or circuit, pointing to a common malfunction.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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