- Engine coolant level too low
- Faulty thermostat
Tech notesStart by checking the coolant level, add coolant if level is too low. If the problem persists the thermostat may be faulty. Using the incorrect thermostat or coolant mixture could trigger the P1281 code.
- Engine Light ON (or Service Engine Soon Warning Light)
P1281 Jeep DescriptionEngine Coolant Temperature (ECT) is monitored with engine running. The P1281 code will set if the engine coolant temperature does not reach 181 F (83 C) while driving for more than 3 minutes and less than one hour depending on the engine load and start up temperature.
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