Engine-Codes - Toyota - P043E Toyota

P043E Toyota Code - Evaporative Emission System Leak Detection Reference Orifice Low Flow

- Code Popularity: 66,052 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P043E Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Canister Pump Module
  • Canister Pump Module harness is open or shorted
  • Canister Pump Module circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

Code Tech Notes

There are Factory Service Bulletins for the following Toyota models:

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

2006–2009 Toyota RAV4
2006–2009 Toyota RAV4 Factory Service Bulletin OBDII Code P043E
The service bulletin recommends replacing the EVAP Charcoal Canister Assembly to repair the problem.

⚠ Does your Toyota have Safety Recalls? → Check here

How to Fix the DTC P043E Toyota?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P043E Toyota code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P043E Toyota Code Mean?

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs) (Typical value)] and saturated within a minute. If not, the ECM interprets this as a malfunction. The ECM illuminates the MIL and stores a Diagnostic Trouble Code (DTC) if this malfunction is detected in consecutive drive cycles. The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.
P043E Toyota Code - Evaporative Emission System Leak Detection Reference Orifice Low Flow

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