Dtc E504, E545, 7700, 7900 & 8100
 

While chasing down a misfire problem (now isolated to 1 particular injector), I am also getting these codes on my reader....but not on a consistent basis.

Neither the code book with the reader, nor the Factory Manual (at least what I can find) shows these codes.

Now, after swapping No. 1 & 3 coils & injectors, I'm getting the red "brake" and "ABS inop" on the dash....but not all the time. If I do an off-on of the ignition, the brake/ABS resets but usually comes back on after about 1 mile. Stepping/not stepping on the brake has no effect in setting this particular warning.

Only reason I mention swapping coils/injectors is that I was working right near the ABS module. Thinking I bumped and disturbed the connector, I pulled off the connector to the module and sprayed it with electrical contact cleaner and reinstalled the connector, but still getting the warning.

I don't have the scan tool mentioned in the FSM that will tell me if the ABS Module is defective...which I doubt. I suspect a loose electrical connection.

2000 Camaro V6 auto/air/4whl disc/ABS (No Traction) 144k miles

Thanks for any help or suggestions.

Re: Dtc E504, E545, 7700, 7900 & 8100
 

im not really sure of your problem but the year of the car might help others determin the problem. good luck with your car