AutoCodes – Toyota – P043F 2018 Toyota RAV4

P043F 2018 Toyota RAV4 Code - Evaporative Emission System Reference Orifice High Flow

Quick Answer

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister Pump Module circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P043F 2018 Toyota RAV4 indicates Evaporative Emission System Reference Orifice High Flow.
Common causes: Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister Pump Module circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 422

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P043F 2018 Toyota RAV4 Description

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.

OBDII Code P043F 2018 Toyota RAV4 - Evaporative Emission System Reference Orifice High Flow - AutoCodes.com — P043F 2018 Toyota RAV4 Code - Evaporative Emission System Reference Orifice High Flow

What does this mean?

What are the Possible Causes of the DTC P043F 2018 Toyota RAV4?

Faulty Canister Pump Module
Canister Pump Module harness is open or shorted
Canister Pump Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P043F 2018 Toyota RAV4?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P043F 2018 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P043F 2018 Toyota RAV4 code?

Need more information on how to fix the P043F 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P043F 2018 Toyota RAV4 Code

What does OBDII code P043F mean for a 2018 Toyota RAV4?

Code P043F indicates "Evaporative Emission System Reference Orifice High Flow," meaning there is an issue with the EVAP system's ability to manage fuel vapor properly due to excessive flow through the reference orifice.

What are the common symptoms of code P043F?

Symptoms include the check engine light turning on, potential fuel smell near the vehicle, reduced fuel efficiency, and sometimes difficulty passing emissions tests.

What causes code P043F in a 2018 Toyota RAV4?

Common causes include a malfunctioning EVAP purge valve, a stuck-open vent valve, damaged or clogged hoses, or an issue with the reference orifice itself.

Can code P043F cause drivability issues?

Typically, P043F does not directly impact drivability, but unresolved EVAP issues can lead to increased emissions and fuel vapor leaks.

How is code P043F diagnosed?

A mechanic will use a scan tool to confirm the code, inspect EVAP components like the purge valve and vent valve, and may perform a smoke test to check for leaks in the system.

Can I still drive my 2018 Toyota RAV4 with code P043F?

Yes, you can still drive the vehicle, but itâ€™s recommended to address the issue promptly to avoid potential emissions problems and fuel vapor leaks.

How do you fix code P043F on a 2018 Toyota RAV4?

Repairs may include replacing the EVAP purge valve, vent valve, or reference orifice, fixing damaged hoses, or cleaning clogged components.

Is code P043F covered under warranty for a 2018 Toyota RAV4?

If your vehicle is still under the emissions warranty, certain EVAP system repairs may be covered. Check with your Toyota dealer for warranty specifics.

What tools are needed to fix code P043F?

Basic tools include a scan tool for diagnostics, wrenches for component removal, and a smoke machine for leak detection in the EVAP system.

How can I prevent code P043F from recurring?

Regular maintenance of the EVAP system, ensuring proper fueling practices, and addressing any fuel system issues promptly can help prevent this code from reappearing.