PID (Position Indication) Sensor Fault
There is a malfunction in the position sensing 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 position sensor that tells the engine how far the throttle is open isn't working properly.
What the computer is actually seeing
The engine control module (ECM) receives inconsistent or no signals from the position sensor, which indicates incorrect throttle position.
What a healthy reading looks like
The expected voltage from the position sensor should be between 0.5V (fully closed) and 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.
- 11. Inspect the wiring and connectors of the position sensor for any signs of damage or corrosion. Fix any issues found. Decision: If wiring/connectors are good, proceed to step 2.
- 22. Measure the voltage output from the position sensor with the key on, engine off. Expected range is 0.5V to 4.5V. Decision: If outside expected range, replace the position sensor. If within range, proceed to step 3.
- 33. Check the throttle body actuator for proper operation. Use a scan tool to observe live data while moving the throttle position. Decision: If actuator does not respond appropriately, replace the actuator. If it responds, inspect the ECM for faults.
Common causes
- Bad position sensor
- Damaged wiring or connectors
- Failed throttle body actuator
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity indicates it's best to fix soon, as drivability may be affected.
Will this code come back after I fix it?
If the issue causing the fault is resolved, the code should not reappear.
Why do I see this code with others like SPN 4338?
These codes often indicate related issues with the position sensing system; addressing one may resolve the others.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →