Tuesday, December 21st, 2021 AT 3:10 AM
BIGEEE80
- MEMBER
- 1991 GMC SIERRA
- 5.7L
- V8
- 4WD
- AUTOMATIC
- 125,000 MILES
What does that mean?
OBD 1 code 85 prom error
1 Reply
ASEMASTER6371
- MECHANIC
- 52,796 POSTS
Good morning,
There is a chip in the ECM that is called the prom. It stands for programmable read-only memory.
When this code happens, the chip has to be replaced.
You need to remove the ECM, open the plate with the 2 small bolts, and give me the number off the prom. That way I can try and see if it is still available.
I attached the procedure and some pictures for you of the removal.
Roy
There is a chip in the ECM that is called the prom. It stands for programmable read-only memory.
When this code happens, the chip has to be replaced.
You need to remove the ECM, open the plate with the 2 small bolts, and give me the number off the prom. That way I can try and see if it is still available.
I attached the procedure and some pictures for you of the removal.
Roy
Images (Click to make bigger)
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Tuesday, December 21st, 2021 AT 4:02 AM
