C1611

Symptoms

• Unstable engine operation
• Power Loss
• Check Engine Light Illuminates
• Problems starting the engine
• Malfunctions of other vehicle systems

Causes

• Internal ECU fault
• ECU power problems
• Short circuit in wiring harness
• Damage to ECU firmware
• Corrosion of contacts or connectors

How to Fix

1. Check ECU power supply and grounding
2. Inspect the wiring harness for damage
3. Check ECU contacts and connectors
4. Scan the ECU for additional errors
5. Reflash or replace the ECU if necessary

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