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Home >> Dodge and Ram >> 2015 >> ProMaster City Base >> Repair and Diagnosis >> Engine Performance >> System >> 2.4L - DTCS P0503 To P1043 >> DTC Troubleshooting >> P0688-ASD/Main Sense Circuit >> Possible Causes

Possible Causes

Possible Causes
ASD RELAY OUTPUT CIRCUIT OPEN
ASD RELAY OUTPUT CIRCUIT SHORTED TO GROUND
ASD/MAIN RELAY
POWER DISTRIBUTION CENTER (PDC)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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