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P043e Toyota

P043e Toyota - Evaporative Emission System Reference Orifice Clog Up

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P043e Toyota Comments |  Add Comment
Possible causes
- Faulty Vacuum Pump Module
- Vacuum Pump Module harness is open or shorted
- Vacuum Pump Module circuit poor electrical connection.
- Faulty Engine Control Module (ECM)
Help with Possible causes What does this mean?
Tech notes
There is a factory service bulletin for the following Toyota models:

2005–2006 Toyota Corolla
2005–2006 Toyota Matrix
Toyota Corolla, Matrix Factory Service Bulletin OBDII Code P043E

Service bulletin recommends replacing the EVAP Charcoal Canister Assembly to repair the problem.
Help with Tech Notes What does this mean?
When is the code detected?
To determine leak criterion (Reference pressure), vacuum pump creates negative pressure in canister pump module through 0.02 inch orifice and pressure is measured. If the conditions are not met, Engine Control Module (ECM) the code will be set.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P043e Toyota Description

5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure.

P043e Toyota Information for specific Toyota models
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