Free API
P1641low severityPowertrain

MIL Control Circuit

on 2000 GMC Savana 4.3L V6 · RWD

What this code means

The PCM detected a fault in the malfunction indicator lamp control circuit. The check engine light may not illuminate properly.

Symptoms

  • MIL not working
  • Check engine light stays on
  • Bulb check failure

Common causes

  • Burned out MIL bulb
  • MIL circuit wiring fault
  • Faulty instrument cluster
  • Faulty PCM

Diagnostic steps

  1. Check MIL bulb operation
  2. Inspect MIL control wiring
  3. Test cluster and PCM control circuit
  4. Repair wiring or replace faulty component

Other Powertrain codes on this vehicle

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