Common Symptoms
- Check Engine Light illuminated
- Engine may not start or cranks but fails to fire
- Intermittent stalling or engine shutdown while driving
- Loss of communication with scan tool or erratic scan data
- Sudden loss of power or limp mode activation
- Various other fault codes stored simultaneously
Most Likely Root Causes
- Corrupted engine control module internal memory or software
- Low or fluctuating battery voltage during ECM operation
- Failed engine control module requiring replacement
- Incomplete or interrupted ECM software flash or update
- Electrical noise or voltage spike damaging ECM circuits
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Component Location
The engine control module is typically mounted in the engine compartment, often on the firewall, inner fender, or under the air intake assembly.
Manufacturer Notes
This code typically indicates internal ECM failure and often requires module replacement or reprogramming by the dealer.
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