P0601 — Internal Control Module Memory Check Sum Error
Category: Powertrain Severity: High
Updated:
DTC code P0601 means: Internal Control Module Memory Check Sum Error. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include faulty ECM/PCM, software/calibration error and low battery voltage; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Faulty ECM/PCM
- Software/calibration error
- Low battery voltage
- Corrupted memory
Symptoms
- Engine won't start or misfires
- Erratic behavior
How to diagnose it step by step
- Check battery and grounds.
- Look for manufacturer software updates.
- Reflash the ECU.
- Replace or repair the ECU if the error persists.
How to fix it
Check the battery and grounds; it may require reprogramming or replacing the ECU.
Estimated repair cost
Reflash: $100–250. ECU: $500–1,500.
Frequently asked questions
What does DTC code P0601 mean?
Internal Control Module Memory Check Sum Error.
Is code P0601 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0601?
Not recommended: the ECU may behave unpredictably.
Related codes
P0600 P0602 P0603 P0604 P0605 P0606 P0615 P0620 P0627 P0641
Refine by car make
- Audi P0601: ECM or power supply.
- BMW P0601: ECM or battery voltage.
- Ford P0601: Low battery or PCM reprogramming.
- Opel P0601: ECM.
- Peugeot P0601: ECM or power supply.
- Renault P0601: ECM or power supply.
- Toyota P0601: ECM.
- Volkswagen P0601: ECM or power supply issue.
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