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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (2.0L - DTCS P040B To P0463) >> DTC Troubleshooting >> P0426 Catalyst Temperature Sensor Circuit Performance (Bank 1 Sensor 1) >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
DAMAGED OR IMPROPERLY INSTALLED EXHAUST SYSTEM
DAMAGED OR IMPROPERLY INSTALLED GPF INLET TEMPERATURE SENSOR
GASOLINE PARTICULATE FILTER (GPF) TEMPERATURE SENSOR MODULE

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  2.0L - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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