Proud Position Sensor Fault
There's an issue with the proud position sensor in the exhaust system.
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 proud position sensor measures how much the exhaust valve opens. If it's faulty, the engine doesn’t know how well the exhaust system is working, which can cause performance issues.
What the computer is actually seeing
The engine control unit (ECU) expects the proud position sensor to output a voltage signal between 0.5V (closed) and 4.5V (fully open). If it receives a flat line (0V or 5V) or fluctuating values that don't match expected behavior, it triggers the fault code.
What a healthy reading looks like
0.5V to 4.5V for the proud position sensor during operation, with specific voltage readings corresponding to known valve positions.
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 wiring to the proud position sensor for any damage or loose connections. Clean and secure them if necessary. Decision Point: If wiring is good, proceed. If not, repair or replace wiring as needed.
- 22. Inspect the connector at the proud position sensor for corrosion or bent pins. Clean or replace the connector if it looks damaged. Decision Point: If the connector looks good, continue. If not, replace the connector.
- 33. Measure the voltage output from the proud position sensor with the engine running. You should see voltage between 0.5V and 4.5V. Decision Point: If voltage is within range, the sensor may be functioning but still could be faulty; if outside range, proceed to next step.
- 44. Replace the proud position sensor with a known good one to see if the problem persists. Decision Point: If the fault code goes away, the sensor was faulty. If not, further investigation into the ECU may be needed.
Common causes
- Wiring issues or shorts in the sensor circuit
- Faulty proud position sensor
- Bad connector or corroded pins
- Software issue in the ECU
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but engine performance may be affected. Monitor closely and avoid heavy loading until fixed.
Will the code come back after I clear it?
It can come back if the underlying issue isn't fixed. Always perform diagnostics before clearing.
Why does this code pair with other codes?
The proud position sensor is part of a system with other sensors that monitor exhaust flow. Issues can overlap and trigger multiple codes.
Working a real vehicle right now?
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