Invalid or Missing Data from the Engine Control Module
The ECM is not receiving valid data from a specific sensor or module.
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)
Your engine control module (ECM) can’t read data from a sensor or module it needs, which can mess with engine performance and emissions.
What the computer is actually seeing
The ECM expects to see valid data signals such as voltage or temperature readings but gets either nothing or values that are out of range.
What a healthy reading looks like
Key expected values include voltage readings typically around 0.5V to 4.5V depending on the sensor type, or temperature readings between -40C to 125C for most engine sensors.
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 wiring and connectors for the affected sensor or module — look for obvious damage, corrosion, or loose connections.
- 22. Measure the sensor output using a multimeter. If it falls outside of expected values (0.5V - 4.5V), go to step 3.
- 33. Swap the suspect sensor with a known good one to see if the code clears. If yes, replace the faulty sensor.
- 44. If the output is normal, check for updates or reprogramming needed for the ECM. If the problem persists, the ECM may be faulty.
Common causes
- Faulty sensor or module
- Wiring issues (broken, shorted, or corroded wires)
- Connector problems (loose, corroded, or damaged connectors)
- Software issues in the ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means it's okay for a short while, but fix it soon to avoid performance issues.
Will this code come back after fixing it?
If you fix the underlying issue, like replacing a bad sensor or wiring, it shouldn't return.
Why does this code pair with other codes?
Often, multiple sensors are interconnected or depend on the same module, causing related codes to appear.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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