Load Signal
The ECM has detected an abnormal load signal from the engine system.
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What it means (plain English)
The engine control module (ECM) is monitoring how much load the engine is under, and something's not right. It's meant to read a specific voltage or signal indicating engine load, and it's out of the expected range.
What the computer is actually seeing
The ECM expects the load signal to fall within a specific voltage range (usually around 0.5V to 4.5V) depending on the engine speed and conditions, but it sees a value that's too low or too high.
What a healthy reading looks like
Typical load signal output should be between 0.5 to 4.5 volts. It may vary based on engine RPM and throttle 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 connectors for the load sensor. Look for frays, corrosion, or loose connections. If any issues are found, repair them and retest.
- 22. Check the voltage at the load sensor with a multimeter while the engine is running. It should read between 0.5V and 4.5V under normal conditions. If the reading is outside this range, go to step 3.
- 33. Swap the load sensor with a known good sensor and observe if the code returns. If the code does not return, replace the faulty load sensor.
- 44. If the sensor swap does not resolve the issue, check the engine control module (ECM) for faults or calibration issues.
Common causes
- Faulty load sensor
- Wiring issue or a bad connection
- Defective ECM
- Inaccurate engine parameters due to other issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe, but be cautious as it might affect engine performance.
Will the code come back?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code pair with others?
Other codes often indicate related issues affecting engine performance and load signal.
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