Powertrain Controls - ECM/PCM

DTC 51 = PROM Error
DTC 85 = PROM Error
DTC 87 = Electrically Erasable Programmable Read Only Memory (EEPROM) Error

DTC(s) 51, 85, 87 will be stored when an invalid program is detected by the PCM. check that all connectors are fully inserted in the socket. If OK reprogram the PCM. If PCM will not reprogram, replace PCM.

NOTE: Replacement PCM's must be reprogrammed, it is also necessary to transfer the ESC module when replacing the PCM. To prevent possible electrostatic discharge damage to the PCM, do not touch the component leads.