DTC's, Problems & Troubleshooting
1996 Olds 88 - P1655 and P1406 **FIXED**
Trying to get this car to pass emissions, In Ga any MIL light fails. Started with 5 codes related to o2 sensors, misfire, and the two codes in the title.
Trouble shooting started with plugs, wires, removed all coils cleaned and applied dielectric...