U0601
Internal Control Module Software Incompatibility
A control module has detected that its own internal software version is inconsistent — for example a partial flash that left the module with mismatched calibration and program code. The module may go offline or operate in a fallback mode.
A control module has detected that its own internal software version is inconsistent — for example a partial flash that left the module with mismatched calibration and program code. The module may go offline or operate in a fallback mode.
Common causes
- high
Incomplete or interrupted module flash
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-1650
- medium
Corrupted calibration block
A plausible cause — test and verify before replacing parts.
Typical part cost: $90-1650
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for U0601.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for U0601.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for U0601.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does U0601 mean?
U0601 means "Internal Control Module Software Incompatibility". It is a generic OBD-II code that points to a fault in the network / communication.
What are the most common causes of U0601?
incomplete or interrupted module flash; corrupted calibration block; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full U0601 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.