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.
Code P080, Fuel System Rich: Notes
This test detects a rich condition caused by fuel injection system, or by evaporative emission control fuel canister that is purging continuously, causing a rich engine condition. Code can only be set during sustained steady driving, such as sustained cruise control operation. Code P080 sets when all test conditions have been met and long term fuel trim is 104 or less (rich system). System turns off canister purge in an attempt to lean out system.
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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.