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Home >> Chrysler >> 2007 >> Aspen 5.7 2, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0016 To P0123 >> P0051-O2 Sensor 2/1 Heater Circuit Low >> Possible Causes

Possible Causes

Possible Causes 
(K199) O2 2/1 HEATER CONTROL CIRCUIT SHORTED TO GROUND
EXCESSIVE RESISTANCE IN THE (K199) O2 2/1 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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