Cherokee 2WD L4-150 2.5L VIN P MFI (1991)
Emissions Maintenance Light: Service and Repair
This output device is located in the instrument panel, and its purpose is to inform the driver that the vehicle requires scheduled maintenance for certain
emission system components. The Single Board Engine Controller (SBEC) illuminates this lamp at certain mileage intervals. The controller keeps track
of the vehicle mileage by monitoring the vehicle distance (speed) sensor. The EMR Lamp illuminates at 82,500 mi.
RESET PROCEDURE
The EMR light can ONLY be reset through the use of a SCAN TOOL. If the engine controller is replaced, the current vehicle mileage needs to
be entered into the EMR memory of the new controller. For more instructions on the proper use of a scan tool, refer to Computers and Control
Systems/Testing and Inspection/Procedures.
