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p1655 p1406

  1. 1996 Olds 88 - P1655 and P1406

    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...
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