Internal Control Module Memory Check Sum Error
This code indicates a checksum error in the control module's memory.
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 in your vehicle is checking its own memory and found something wrong. It’s like a mistake in a homework assignment that makes it unsure about what it’s supposed to remember.
What the computer is actually seeing
The control module sees that the data in its memory doesn’t match the expected values, indicating potential corruption or malfunction.
What a healthy reading looks like
Checksum values should match pre-programmed values stored in the module’s firmware.
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.
- 1Check the battery voltage; it should be between 12.0 - 12.8 volts with the engine off and 14.0 - 14.8 volts running.
- 2Inspect wiring and connections to the control module for corrosion, damage, or loose connections.
- 3Clear the code and recheck; if it returns, suspect the control module itself.
- 4Test the control module for software updates or reprogramming; consult manufacturer for necessary steps.
Common causes
- Faulty control module
- Corrupt software in the control module
- Power supply issues (voltage too low or high)
- Poor connection at the control module connector
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It depends; the vehicle may run but systems could fail leading to safety issues.
Will this problem come back after clearing the code?
If the underlying issue isn't fixed, it likely will return.
Why might this code appear after a battery replacement?
A battery replacement can reset the control module; if it doesn't recognize its own settings correctly, checksum errors can occur.
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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