Internal Control Module Read Only Memory Error
Table of contents
P0605 MERCURY Possible Causes
- Powertrain Control Module (PCM) programming error
- Physically damaged Powertrain Control Module
- Faulty Powertrain Control Module
- Powertrain Control Module harness is open or shorted
- Powertrain Control Module circuit poor electrical connection
How do I fix code P0605 MERCURY?
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
- Try clearing the code before replacing any parts. Reprogram the Vehicle Identification (VID) block (use as built data). Check for other Diagnostic Trouble Code (DTC) or drive symptoms for further action. Make sure to check for aftermarket performance products before installing a new Powertrain Control Module (PCM).
Cost of diagnosing the P0605 MERCURY code
The cost of diagnosing the P0605 MERCURY 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine may not start
P0605 MERCURY Description
The Powertrain Control Module (PCM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the Powertrain Control Module is functioning properly. The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module Read Only Memory (ROM) has been corrupted.