Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP1991CHEROKEE 2WD L4-150 2.5L VIN P MFIREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSEMISSION CONTROL SYSTEMSSYSTEM SPECIFICATIONSMAINTENANCE PROCEDURESEMISSION MAINTENANCE REMINDER (EMR) LIGHT
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFI
Emission Maintenance Reminder (EMR) Light
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFISECTION Emission Maintenance Reminder (EMR) Light
The Emission Maintenance Reminder (EMR) Light comes on at approximately 82,500 miles. The EMR informs the driver when oxygen sensor and other selected emission maintenance is required.
Failure to perform the required maintenance and only reset the EMR light may be in violation of federal law. Only after performing the required maintenance, should the EMR light be reset.
Resetting the EMR light requires the use of the DRBII or equivalent scan tool. Refer to COMPUTERIZED ENGINE CONTROLS for reset procedures.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.