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.
Diagnostic Aids
An accurate indication of fuel level is required for PCM to properly pass or fail this DTC. Always diagnose fuel level sensor DTCs before performing this DTC test. Always check for fuel level sensor DTCs stored as history.
Perform physical inspection of EVAP system. Check the following items:
- Battery voltage 10.5-18.0 volts.
- Fuel level 15-85 percent of full capacity.
- ECT 38-95°F (3.5-35°C).
- Loose, missing, defective, or incorrect fuel tank cap.
- Incorrectly routed or defective EVAP system vacuum and vapor lines.
- A malfunctioning or damaged EVAP vapor canister.
- Check for charcoal release from EVAP vapor canister.
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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.