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.
Circuit Description
The EVAP system draws stored fuel vapors from the charcoal canister. The canister purge solenoid is used to control flow of vapors from canister to intake manifold. PCM controls solenoid with a Pulse Width Modulated (PWM) signal. PCM uses a Generic Field Effect Transistor Driver (GFD) to control solenoid's ground when certain conditions have been met. The GFD driver has the capability to diagnose if circuit has opened or shorted.
DTC will set if feedback signal voltage is greater than 0.3 volt when solenoid is commanded on, or less than 7 volts when solenoid is commanded off.
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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.