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P1420 OBD II Fault Code: Diagnosis and Fix for 2002 Jeep Liberty 4WD

Model: Jeep Liberty Fault Code: P1420 Posted: 2014-07-24 20:22

Hello, my dad recently found the P1420 OBD II fault code in his 2002 Jeep Liberty 4WD. He followed online guides that suggested a fix based on common causes, but after implementing those steps, the check engine light remains on. I'm looking for accurate information to help diagnose and resolve this specific P1420 code in a 2002 Jeep Liberty. Any insights or troubleshooting steps would be greatly appreciated!

Related fault codes
P1420
Comments (1)
Anonymous 2014-07-25 06:00

The P1420 OBD II fault code indicates a Catalyst Temperature Sensor failure, which may require sensor replacement or further inspection of the exhaust system to confirm proper function.