Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection/Maintenance System Check: Description
Due to the nature of the vehicle's designed to run on fuels other than gasoline, some additional procedures may be required in order to set the I/M System Status indicators to YES. Vehicles designed to run on both gasoline and Compressed Natural Gas (CNG) will disable certain diagnostic tests when vehicle is operating on CNG. These vehicles will require operation using gasoline in order for the remaining tests to run. The system set procedures for gasoline vehicles can be used once vehicle is operating on gasoline.
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.