Electronic Throttle Control Position - Sensor A
This code indicates a problem with the electronic throttle control position sensor.
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 electronic throttle control position sensor tracks how far the accelerator pedal is pressed and sends this info to the engine computer. If it detects an unexpected voltage or reading, it triggers this code.
What the computer is actually seeing
The engine control module (ECM) expects the throttle position sensor to provide a voltage signal between 0.5V and 4.5V, proportional to the position of the throttle plate.
What a healthy reading looks like
Throttle position signal should typically range from 0.5V (closed) to 4.5V (fully open).
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.
- 1Start with a visual inspection of the throttle position sensor and its wiring. Look for damaged wires or loose connectors.
- 2Using a multimeter, check the voltage output of the throttle position sensor with the ignition on but engine off. Confirm it’s within expected values (0.5V - 4.5V). If not, replace the sensor.
- 3If the sensor checks out, inspect the accelerator pedal position sensor. Test its output and check for wiring issues.
- 4Finally, run any available software updates or calibrations on the ECM if all else appears functional.
Common causes
- Faulty throttle position sensor
- Wiring issues or poor connections
- Faulty accelerator pedal position sensor
- Software or calibration issues in the ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's advisable to fix this code soon as it may affect engine performance and drivability.
Will this code come back after clearing?
If the underlying issue is not resolved, the code is likely to return.
Why does this code sometimes pair with SPN 2724?
SPN 2724 also relates to throttle control issues, indicating both the sensor and related components may be affected.
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