Throttle Position Sensor Voltage Too High
The Throttle Position Sensor (TPS) signal is above the expected range.
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What it means (plain English)
The Throttle Position Sensor sends a signal to the engine control unit about how far the gas pedal is pressed. If the voltage is over 4.5 volts, it means the signal is stuck too high, as it should typically be between 0.5 and 4.5 volts.
What the computer is actually seeing
The computer monitors the TPS voltage. If it detects a voltage higher than 4.5V, it flags this code because it indicates a potential problem with the throttle position monitoring.
What a healthy reading looks like
0.5V - 4.5V for TPS signal under normal operation; should increase with throttle application.
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 throttle position sensor wiring for frays or shorts; look for signs of wear or damage.
- 2Using a multimeter, measure the TPS voltage at the sensor connector. It should be between 0.5V and 4.5V as you manually move the throttle.
- 3If voltage readings are above 4.5V, replace the throttle position sensor and retest.
- 4If the TPS is within range but the code reappears, inspect the wiring and connector for continuity issues.
- 5If all checks out and the code persists, suspect a faulty ECU.
Common causes
- Faulty throttle position sensor
- Wiring issues (shorts, damaged insulation)
- Faulty engine control unit (ECU)
- Incorrectly adjusted throttle linkage
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I still drive my vehicle with this code?
Yes, but drive with caution. It may affect performance, so repair soon.
Will this code come back after resetting?
If the issue isn't fixed, yes, it will return.
What else can trigger this code?
A blockage or mechanical binding in the throttle body can also cause high TPS voltage.
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