LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 1995 >> Roadmaster Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.7L >> ECM/Pcm Code Charts >> Code 11, Malfunction Indicator Light >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code 11, Malfunction Indicator Light: Notes

MIL should always be on steady with ignition on and engine stopped. Ignition voltage is supplied directly to bulb. PCM turns on light by providing a path to ground.

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. If MIL driver circuit or ignition feed circuit to bulb is open, MIL will not illuminate.
  2. Jumper Harness (J 35616-A) should be used instead of directly probing harness. This will prevent damage to harness.
  3. MIL should go off after engine starts. If it does, problem is not present at this time. If light does not go off, drive circuit is shorted to ground or PCM is faulty.
  4. If other codes exist, use other code charts first, then restart at beginning of this chart.