2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 516
10.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P Code Charts/P0451.
Is the inspection result normal?
YES - GO TO 11.
NO - Replace EVAP control system pressure sensor.
11.CHECK INTERMITTENT INCIDENT
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Trouble
Diagnosis For Intermittent Incident/Description.
- INSPECTION END
Component Inspection
1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Turn ignition switch OFF.
2. Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
3. Install a vacuum pump to EVAP control system pressure sensor.
4. Turn ignition switch ON and check output voltage between ECM harness connector terminals under the following conditions.
CAUTION:
- Always calibrate the vacuum pump gauge when using it.
- Never apply below -93.3 kPa (-0.952 kg/cm2, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm2, 14.69 psi).
Is the inspection result normal?
YES - INSPECTION END
NO - Replace EVAP control system pressure sensor
P0452
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pressure
