GM OBD Trouble Code 85
OBD I Code 85 - PROM error
If the ECM detects an internal fault with the PROM code 85 will set. The PROM is a special "chip" that is installed in the ECM, based on the particular vehicle configuration.
Fault Code Description
- 85 - PROM
Symptoms
- Engine may not start
- Poor engine performance
Common Problems
- Internal fault with PROM
- PROM incorrectly installed in ECM
Related Questions
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Replaced the ecm , changed the the spark plugs and spark plug wires, change the cam sensors, why is the check engine...
Dont work checked fuses and relays good