Data Link - Cumulative Engine Run Time
Engine run time data is not being communicated properly.
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 computer tracks how long the engine has been running, but it can't get that info right now.
What the computer is actually seeing
The Engine Control Module (ECM) expects to see cumulative engine run time information reported accurately by the data link. If this value is not updating or is incorrect, it triggers the fault code.
What a healthy reading looks like
Expected engine run time should be incrementing correctly, typically measured in hours from the last reset.
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.
- 1Inspect the wiring and connectors for any obvious damage or corrosion.
- 2Check the engine control module (ECM) software version for updates or corruption.
- 3Verify the integrity of the connection between the ECM and all linked sensors, ensuring reliable communication.
- 4Using a scan tool, confirm if the cumulative run time value is updating when the engine is running.
Common causes
- Faulty data link connection
- Corrupted ECM software
- Malfunctioning engine sensors that provide run time data
- Wiring issues between ECM and engine sensors
- Excessive moisture or corrosion in connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code.
Yes, it's generally safe, but monitor for other symptoms and address it soon.
Will this code come back after I clear it?
If the underlying issue isn't resolved, it will likely return.
Why does this code show alongside others?
It often pairs with other data link issues or sensor faults.
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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