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Home >> Chrysler >> 2007 >> Aspen 5.7 2, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0016 To P0123 >> P0037-O2 Sensor 1/2 Heater Circuit Low >> Possible Causes

Possible Causes

Possible Causes 
(K299) O2 1/2 HEATER CONTROL CIRCUIT SHORTED TO GROUND
EXCESSIVE RESISTANCE IN THE (K299) O2 SENSOR 1/2 HEATER CONTROL CIRCUIT
O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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

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