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.
2009 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
EVAP Control System Pressure Sensor
- Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one .
- Install a vacuum pump to EVAP control system pressure sensor.
- Turn ignition switch ON and check output voltage between ECM terminal 42 (EVAP control system pressure sensor signal) and ground under the following conditions.VOLTAGE REFERENCE CHART
Applied vacuum kPa (kg/cm2 , psi) Voltage (V) Not applied 1.8 - 4.8 -26.7 (-0.272, -3.87) 2.1 to 2.5 V lower than above value
Factory Service Tools
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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.