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Home >> Chrysler >> 2008 >> Pacifica Limited, AWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0016 To P0111, Pre-Diagnostic Troubleshooting Procedure, Component Checks, Charging System Check, Power And Ground Circuit Checks >> P0037-O2 Sensor 1/2 Heater Circuit Low >> Possible Causes

Possible Causes

Possible Causes 
INTERMITTENT DTC
(K299) O2 1/2 HEATER CONTROL CIRCUIT SHORTED TO GROUND
(K299) O2 1/2 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
1/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  before proceeding.

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