Engine Control Module (ECM) - Engine Position Sensor Range/Performance Problem (Bank 1)
This code indicates a problem with the engine position sensor on bank 1.
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 engine position sensor helps the computer know the exact position of the engine's components. If it reads incorrect data, the engine won't run right.
What the computer is actually seeing
The ECM expects to see a specific range of voltages from the engine position sensor, typically around 0.5V to 4.5V as the engine run changes. If the values are outside of this, the code is set.
What a healthy reading looks like
Normal voltage from the sensor should range between 0.5V and 4.5V, dependent on engine position.
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 connector to the engine position sensor for any damage or corrosion. If any issues are found, repair them before proceeding.
- 22. Check the sensor's output voltage with a multimeter while the engine is running. It should be between 0.5V and 4.5V. If it's outside this range, replace the sensor.
- 33. If the sensor checks out, use a scan tool to monitor live data. Look for abnormalities in the timing data compared to manufacturer's specs. If discrepancies occur, inspect timing gear or belt.
- 44. After repairs, clear the code and take the vehicle for a test drive. If the code returns, check for ECM updates or faults. Replace the ECM if all else checks out.
Common causes
- Faulty engine position sensor
- Wiring issues or connector problems
- ECM software issues
- Timing chain/belt issues, causing sensor misreading
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances, as it may cause performance issues and potential engine damage.
Will this code come back after repairs?
If all faulty components are replaced and the wiring is in good condition, the code should not return.
Why does this code sometimes pair with other codes?
Related faults in the timing system or other sensors can trigger multiple codes due to interdependent functions.
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