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.
DTC Confirmation Test (Overall Function Check)
Malfunction is detected when EVAP system is not functioning properly or there is a leak in hose between EVAP Control System Pressure Sensor (EVAP-CSPS) and intake manifold. Raise drive wheels and support vehicle. Start engine and warm to normal operating temperature. Turn ignition off and wait at least 5 seconds. Start engine and wait at least 70 seconds. Measure and record voltage between ECM harness connector terminal No. 62 and ground by backprobing. See Figure. While monitoring voltage, maintain the following conditions for at least one minute:
- A/C on.
- Steering wheel turned fully.
- Headlights on.
- Rear window defogger on.
- Engine speed at 3000 RPM.
- Transmission in any forward gear.
Ensure voltage remains .1 volt less than voltage measured at idle for at least one second. DTC may not be confirmed using this procedure.
Use the Manual With the Right Hardware
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.