Engine Shutdown Request Received
The engine control module received a signal to shut down the engine.
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What it means (plain English)
This code means the computer got a message from a control module or switch saying to stop the engine. This could be from the ignition switch or an emergency shutdown switch.
What the computer is actually seeing
The engine control module (ECM) sees a specific signal (usually a low voltage or ground signal) that indicates the engine should stop operating. It's looking for a shut-off command that drops below a set threshold for a certain time frame, typically around 100 milliseconds.
What a healthy reading looks like
Typically, the ECM expects a voltage between 0-5 volts on the shutdown request line; anything at or near 0 volts would indicate a shutdown request.
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 ignition switch operation. Turn the key to the OFF position and back to RUN. Ensure normal function with no shutdown request signal present.
- 22. Inspect the wiring and connectors from the ignition switch to the ECM. Look for corrosion, shorts, or breaks in the wires.
- 33. Use a multimeter to test the voltage on the shutdown request line. Expect 0-5 volts when the request is not active. Confirm no abnormal signals are present.
- 44. If everything looks good, check for external signals or modules sending shutdown requests. This may include modules related to safety or emergency systems.
- 55. Clear the code and run the vehicle. Check if the code reappears. If it does, further investigate the ECM and its connections.
Common causes
- Faulty ignition switch
- Wiring issues in the shutdown circuit
- Defective control module
- External shutdown signal from another device
- Recent repair that disturbed the ignition or shutdown wire connections
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe to drive if the engine is shutting down unexpectedly. Get it fixed soon.
Will this code come back after clearing it?
If the underlying issue isn't resolved, yes, it will likely return.
Why does this code sometimes pair with other shutdown codes?
It usually pairs with other codes indicating similar shutdown requests from different sources, like safety systems.
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