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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0503 To P0580 >> P050B-Cold Start Ignition Timing Performance (Non Etc) >> Possible Causes
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Possible Causes

Possible Causes 
RESTRICTED INTAKE AIR SYSTEM
LOW BATTERY VOLTAGE
FUEL CONTAMINATION
EXCESSIVE RESISTANCE IN THE (K61) IAC CONTROL CIRCUIT
EXCESSIVE RESISTANCE IN THE (K961) IAC SIGNAL CIRCUIT
IAC/THROTTLE BODY
PCM

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