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DTC Troubleshooting

DIAGNOSTIC PROCEDURES CHART

Step Action YES NO
Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
Throttle body assembly check 
  1. Check throttle body for operation and condition, see ELECTRIC THROTTLE BODY ASSEMBLY ON-VEHICLE INSPECTION .

Is it in good condition? 
Replace ECM and recheck DTC, see ECM REMOVAL AND INSTALLATION . Replace throttle body assembly, see THROTTLE BODY ASSEMBLY REMOVAL AND INSTALLATION .