Diagnostic Aids

If Code 52 was set, the engine oil life monitor system has been calculating the engine oil life with false information. The oil life monitor must be reset and engine oil and filter changed. A "Scan" tester will read engine oil temperature comparable to MAT or CTS when the engine is cold. Temperature reading on tester should rise as engine oil temperature increases. If Code 52 is intermittent, see INTERMITTENTS in TESTS W/O CODES article in this section.

To reset oil life monitor, turn ignition on. Depress ENG MET button on trip monitor and release. Within 5 seconds, depress and release ENG MET button again. Within 5 seconds, depress and hold the RANGE button on trip monitor. The CHANGE OIL light should flash.

Hold the RANGE button until the CHANGE OIL light stops flashing. When the light goes out, the engine oil life monitor is reset. This should take about 10 seconds. If the light does not reset, turn the ignition off and repeat procedure.