Throttle Position Sensor - Circuit Failure
The throttle position sensor circuit has a problem.
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)
Your engine's electronic control unit (ECU) checks the throttle position sensor to measure how far the accelerator pedal is pressed. If it sees a signal that looks wrong or unstable, it triggers a fault.
What the computer is actually seeing
The ECU sees a throttle position voltage below 0.3V or above 4.7V, or a complete lack of signal when it expects one, while the engine is running.
What a healthy reading looks like
Throttle position voltage should be between 0.5V and 4.0V at idle to full throttle; should be steady when pedal position changes.
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 the throttle position sensor wiring for damage or friction against any components. If you see any frayed wires, repair as necessary.
- 22. Inspect the connector for corrosion, dirt, or looseness. Clean or secure the connection as needed.
- 33. Measure the voltage at the throttle position sensor. It should read between 0.5V and 4.0V at idle. If not, replace the sensor if faulty.
- 44. If sensor voltage is fine but the code persists, check the wiring between the sensor and ECU for continuity. There shouldn't be short circuits or open circuits.
- 55. If all components check out, update the ECU software if an update is available.
Common causes
- Damaged throttle position sensor
- Wiring issue between the sensor and ECU
- Connector corrosion or loose connection
- ECU software glitch
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you can drive but should diagnose and fix soon to prevent drivability issues.
Will this code come back after I clear it?
If the underlying issue isn't fixed, yes, it's likely to return.
Why does this code sometimes pair with SPN 606?
SPN 606 relates to throttle actuator signals, which can be directly affected if the throttle position signal is not meeting expectations.
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