what does that mean?
Dec 20, 2021 at 7:10 PM
OBD 1 code 85 prom error
1991 GMC SIERRA
BIGEEE80
- MEMBER
- 2 POSTS
Advertisement
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 enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Dec 20, 2021 at 8:02 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.