P0601: Internal control module memory check sum error
Stop driving. Get it towed or fixed first.
Can I drive with P0601?
No, stop driving safely as soon as possible. Internal control module memory error; the engine may stall unexpectedly or enter reduced-power limp mode.
What does P0601 mean?
P0601 stands for Internal Control Module Memory Check Sum Error.
Symptoms you may notice
- Check engine light steadily illuminated
- Slight hesitation or change in throttle response
- Possible increase in fuel consumption
How much does it cost to fix?
Repair costs for code P0601 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Corrupted ECU firmware / software memory
- Internal hardware component failure inside ECU
- Low battery voltage during flashing or cranking
- Poor ECU ground contact
What to do next
- Pull over safely if the car enters limp mode, as the engine may stall.
- Have the engine control module reflashed or replaced by a qualified technician.
- Inspect main battery voltage and ground cables.
Last updated: October 2026
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General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P0601 means the engine control module's internal self-check detected corrupted checksum data in its memory chip. While some cars continue driving normally, others enter limp mode or refuse to restart after being turned off. Schedule diagnostic programming with a qualified shop.