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Home >> Jeep >> 2007 >> Grand Cherokee Laredo, 3.0 M >> Repair and Diagnosis >> Engine Performance >> System >> Diesel - DTCS P0277 To P0472 >> P0426 Catalyst Temperature Sensor Circuit Performance - Bank 1 Sensor 1 >> Possible Causes

Possible Causes

Possible Causes 
INTERMITTENT DTC
(K352) PRE-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K916) PRE-CATALYST EXHAUST TEMPERATURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE
(K352) PRE-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(K352) PRE-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO (K916) PRE-CATALYST EXHAUST TEMPERATURE SENSOR GROUND
(K352) PRE-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K916) PRE-CATALYST EXHAUST TEMPERATURE SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
PRE-CATALYST EXHAUST TEMPERATURE SENSOR
ENGINE CONTROL MODULE (ECM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.