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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - Electrical Diagnostics >> Ignition Systems - Electrical Diagnostics >> DTC Troubleshooting >> B2124-Ignition Run Control Circuit Open >> Possible Causes
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Possible Causes

Possible Causes 
(F921) or (F923) RUN RELAY CONTROL CIRCUIT OPEN OR SHORTED TO GROUND
RUN RELAY
FRONT CONTROL MODULE