Malfunction Indicator Lamp Control Circuit

Category

Powertrain - Computer and Auxiliary Controls

Severity

Check Engine Light

Applies to

Silverado, Sierra, Corvette, Camaro, Tahoe

Related

No single generic twin. See OBD Codes List

Findings, check these first

• Open or short in the MIL control circuit between PCM and instrument cluster
• Burned-out or missing MIL bulb in the instrument cluster
• Corroded PCM or cluster connectors
• Short to ground or voltage in the MIL driver circuit
• Faulty powertrain control module MIL driver

Standard procedure

1. Command the MIL on and off with a Tech2 scan tool to verify the circuit
2. Inspect the instrument cluster MIL bulb and cluster connectors
3. Test the MIL control circuit for opens, shorts to ground, and shorts to voltage
4. Check PCM powers, grounds, and connector pin tension
5. Repair wiring or replace the cluster or PCM only after circuit testing

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Related Computer and Auxiliary Controls codes

• P1106Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
• P1107Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
• P1108BARO To MAP Sensor Comparison Too High
• P1111Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage