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 MANUALSJEEP2002LIBERTY LIMITED EDITION 2WD V6-3.7L VIN KREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP0141
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN K
P0141
2002 Jeep Liberty Limited Edition 2WD V6-3.7L VIN KSECTION P0141
Tests 1 - 3:
Tests 4 - 7:
SYMPTOM
P0141-1/2 O2 SENSOR HEATER FAILURE
TEST NOTE
This symptom is diagnosed using the test P0135-1/1 O2 SENSOR HEATER FAILURE.
WHEN MONITORED
With battery voltage greater than 10.5 volts, at a cold start, ECT less than 104 °F, battery temperature sensor equal to or less than 20 °F, and engine at idle for at least 12 seconds.
SET CONDITION
O2 sensor voltage greater than 3 volts for 75 seconds.
POSSIBLE CAUSES
- Intermittent condition
- O2 heater element
- O2 sensor heater supply circuit open
- O2 sensor heater ground circuit open
- O2 sensor heater control circuit shorted to ground
- PCM
RENDER: 1.0x
NO RELATED
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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.