Code 26 - Rich Air/Fuel Mixture

• Loose Engine Ground
• Open E1 Circuit
• Short In Injector Circuit Or Injector
• Fuel Line Pressure (Leaking Injector)
• Open Or Short In Cold Start Injector Or Circuit
• Open Or Short In Oxygen Sensors Or Circuits
• Coolant Temperature Sensor
• Airflow Meter Or Air Intake System
• Compression Pressure
• ECM

For oxygen sensor or circuit testing, see Code 21. For injector or circuit testing, see TEST NO. 9 - INJECTOR CIRCUIT test procedures in this article.