KOER Codes
- If code 11 is displayed, Engine Running Test has been passed. If problems still exist, perform Symptom Diagnosis Test. If problem is intermittent, proceed to Continuous Testing.
- If code 12 is displayed, perform Idle Speed Control Test.
- If code 13 is displayed, perform Idle Speed Control Test.
- If code 21 is displayed, perform Coolant Temperature Sensor Test.
- If code 23 is displayed, perform Throttle Position Sensor Test.
- If code 24 is displayed, problem is in air flow meter circuit. See FORD MULTI-POINT FUEL INJECTION article.
- If code 26 is displayed, problem is in air flow meter circuit. See FORD MULTI-POINT FUEL INJECTION article.
- If code 41 is displayed, perform Fuel Control Circuit Test.
- If code 42 is displayed, perform Fuel Control Circuit Test.
- If no codes, or any codes other than those listed are displayed, perform Diagnostic Circuit Test.