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Home >> Jeep >> 2008 >> Liberty Limited, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0420 To P0563 >> P050B-Cold Start Ignition Timing Performance >> Possible Causes

Possible Causes

Possible Causes 
RESTRICTED INTAKE AIR SYSTEM
LOW BATTERY VOLTAGE
FUEL CONTAMINATION
EXCESSIVE RESISTANCE IN THE (K124) ETC MOTOR (+) CIRCUIT
EXCESSIVE RESISTANCE IN THE (K126) ETC MOTOR (-) CIRCUIT
ETC MOTOR/THROTTLE BODY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.