Powertrain Controls - ECM/PCM

DTC 51 = Programmable Read Only Memory (PROM) Error
DTC 85 = Programmable Read Only Memory (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 Powertrain Control Module (PCM). If PCM will not reprogram, replace PCM.

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