(j) Input the DTC: P0451, P0452 or P0453.
(k) Check the DTC judgment result.
HINT
If DTC judgment result is NORMAL, the repair has been successfully completed.
NEXT -- END
From 08/2009
2GR-FE ENGINE CONTROL: SFI SYSTEM: P0451-P0453: Evaporative Emission Control System Pressure Sensor Range / Performance
DTC SUMMARY
HINT
The canister pressure sensor is built into the canister pump module.
DESCRIPTION
The description can be found in the EVAP (Evaporative Emission) System See: Powertrain Management/Computers and Control Systems/Testing
and Inspection/Component Tests and General Diagnostics/EVAP System.
MONITOR DESCRIPTION
- DTC P0451: Canister pressure sensor abnormal voltage fluctuation or being constant
- If the canister pressure sensor voltage output fluctuates rapidly for 10 seconds, the ECM stops the EVAP system monitor. The ECM interprets
this as the canister pressure sensor voltage fluctuating, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the
DTC.
- Alternatively, if the sensor voltage output does not change for 10 seconds, the ECM interprets this as the sensor being stuck, and stops the
monitor. The ECM then illuminates the MIL and sets the DTC. (Both the malfunctions are detected by 2 trip detection logic.)
- DTC P0452: Canister pressure sensor voltage low
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