LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1992 >> Festiva GL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Quick Tests >> Key On, Engine Off (KOEO) Self-Test >> KOEO
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Key On, Engine Off (KOEO) Self-Test: KOEO

  1. This is a test of electronic engine control system, conducted with power (voltage) applied and engine not running. Activate self-test, and record all codes displayed.
  2. Erase codes, and repeat self-test. Diagnose only codes occurring during repeat self-test. See TROUBLE CODE DEFINITION  table. If no codes are present, proceed to KEY ON, ENGINE RUNNING (KOER) SELF-TEST  .
scientia non olet · About LEMON Manuals