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Home >> Jeep >> 2022 >> Gladiator Mojave, Part Time T/Case Control, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (3.0L Diesel - DTCS P0396-00 To P045C-00) >> DTC Troubleshooting >> P0420-00-Catalyst Efficiency (Bank 1) >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
FACE PLUGGING OF THE DOC WITH SOOT
EXHAUST TEMPERATURE SENSORS
AFTERTREATMENT DIESEL OXIDATION CATALYST (DOC) HAS BEEN REMOVED FROM THE VEHICLE
AFTERTREATMENT DIESEL OXIDATION CATALYST (DOC) IS DAMAGED OR NOT FUNCTIONING PROPERLY
DAMAGED DOC, DPF, OR SCR TEMPERATURE SENSORS
IMPROPER FUELING
WIRE HARNESS

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .