Engine Control Module Internal Performance Error
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
P0606 GMC Possible Causes
- Engine Control Module (ECM) Harness power supply circuit is open or shorted
- Engine Control Module (ECM) Programming
- Faulty Engine Control Module (ECM)
How do I fix code P0606 GMC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- Check the ECM fuse, if the fuse it’s OK, try erasing the code first and if the code comes back you may have to reprogram or replace the ECM.
- There is a Factory Service Bulletin for the following GMC models:
- 2010 GMC Savana
- 2011 GMC Savana
- 2011 GMC Sierra
- GMC Factory Service Bulletin OBDII Code P0606
Cost of diagnosing the P0606 GMC code
The cost of diagnosing the P0606 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
Indicates the ECM has experienced an internal memory fault.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine may not start
P0606 GMC Description
The Engine Control Module (ECM) continuously monitors its internal memory status, internal circuits, and output signals to the throttle actuator. This self−check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light.