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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (3.0L Diesel - DTCS P0403-00 To P061C-00) >> DTC Troubleshooting >> P0427-00-Catalyst Temperature Sensor Circuit Low >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
EXHAUST GAS TEMPERATURE CATALYST SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
EXHAUST GAS TEMPERATURE CATALYST SENSOR SIGNAL CIRCUIT SHORTED TO THE SENSOR GROUND CIRCUIT
EXHAUST GAS TEMPERATURE CATALYST SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .