P0601 is a generic OBD-II trouble code that means: Engine Control Module (ECM/PCM) – Internal Memory Checksum Error. Avoid driving. This fault can cause stalling, overheating or expensive damage (such as to the catalytic converter or engine).
What does P0601 mean?
P0601 is a generic OBD-II trouble code that means: Engine Control Module (ECM/PCM) – Internal Memory Checksum Error. The engine control module (ECM) stores this code when it detects a fault related to: Engine Control Module (ECM/PCM).
Can I still drive?
Avoid driving. This fault can cause stalling, overheating or expensive damage (such as to the catalytic converter or engine).
Symptoms
- Check engine light is on
- Engine stalls
- Hard starting
- Car goes into limp mode
Common causes
- ECM software issue or internal fault
- Faulty alternator, voltage regulator or battery
- Damaged wiring or a loose/corroded connector
How to fix it
- Read all stored codes and freeze-frame data with an OBD-II scanner
- Test the battery and alternator (about 13.5–14.7 V with the engine running)
- Check for ECM software updates and technical service bulletins
- If unsure, have a qualified mechanic diagnose it
Frequently asked questions
What does code P0601 mean?
P0601 is a generic OBD-II trouble code that means: Engine Control Module (ECM/PCM) – Internal Memory Checksum Error. The engine control module (ECM) stores this code when it detects a fault related to: Engine Control Module (ECM/PCM).
What causes code P0601?
The most common causes are: ECM software issue or internal fault; Faulty alternator, voltage regulator or battery; Damaged wiring or a loose/corroded connector.
How do I fix code P0601?
Start with these steps: Read all stored codes and freeze-frame data with an OBD-II scanner; Test the battery and alternator (about 13.5–14.7 V with the engine running); Check for ECM software updates and technical service bulletins; If unsure, have a qualified mechanic diagnose it.
Is it safe to drive with code P0601?
Severity: High. Avoid driving. This fault can cause stalling, overheating or expensive damage (such as to the catalytic converter or engine).