P0601 — Internal Control Module Memory Check Sum Error
| Meaning | The engine computer has run a self-test on its internal memory and found that the data checksum does not match what is expected. This means the internal software memory of the computer has corrupted data or a hardware failure inside the module has occurred. |
| Family | Powertrain (P) |
Typical symptoms
Car may fail to start or crank
Engine may stall while driving
Erratic behavior from various dashboard gauges
Common causes
Failing or damaged internal engine control module hardware
Poor battery voltage or unstable ground supply causing memory write errors
Water intrusion or corrosion affecting the computer connectors
What to do
Frequently asked questions
What does code P0601 mean?
Internal Control Module Memory Check Sum Error. The engine computer has run a self-test on its internal memory and found that the data checksum does not match what is expected. This means the internal software memory of the computer has corrupted data or a hardware failure inside the module has occurred.
Can I keep driving with code P0601 active?
With caution: limp mode possible, have it checked soon
Common causes — P0601
Corrupted software or firmware inside the engine computer Failing or damaged internal engine control module hardware Poor battery voltage or unstable ground supply causing memory write errors Water intrusion or corrosion affecting the computer connectors
How do you fix code P0601?
You should check the battery health, charging system voltage, and all ground connections first to rule out power supply issues. Address this promptly, as an internal computer failure can leave you stranded without warning.
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