Code 52 - Fuel CALPAK Missing

Engine idling. Note "Service Engine Soon" light after 10 seconds. If light is off, no trouble found. Check Calpak PROM to insure proper installation.

If light is ON, turn ignition ON and engine OFF. Ground test terminal and note Code. If Code 52 is present, install Calpak PROM in ECM. If other Codes other than Code 52, see appropriate chart.