[SOLVED] P043F Code: Fixing High Flow In Evaporative Emission System Reference Orifice

The automobile fault code P043F indicates a problem with the Canister Pump Module. The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light. The cause of this fault code can be a faulty Canister Pump Module, an open or shorted harness, a poor electrical connection in the Canister Pump Module circuit, or a faulty Engine Control Module (ECM).

To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. Look out for broken, bent, pushed out, or corroded connector pins. The repair time for this issue is estimated to be around 1.0.

It is important to address this fault code promptly to prevent further damage to your vehicle.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p043f fault code.

  • The symptoms of the automobile fault code p043f include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p043f can be caused by a faulty Canister Pump Module, an open or shorted Canister Pump Module harness, a poor electrical connection in the Canister Pump Module circuit, or a faulty Engine Control Module (ECM).

  • The fault code p043f can be caused by: a faulty Canister Pump Module, an open or shorted Canister Pump Module harness, a poor electrical connection in the Canister Pump Module circuit, or a faulty Engine Control Module (ECM).

To fix the automobile fault code p043f, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p043f, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • This fix typically takes around 1.0 hour to complete.

The automobile fault code p043f can be diagnosed and fixed within an estimated repair time of 1.0 hour. Auto repair shops typically charge between $75 and $150 per hour for this service.

The P043F fault code refers to a high flow in the Evaporative Emission (EVAP) system’s reference orifice. This code is triggered when the Engine Control Module (ECM) detects that the EVAP pressure is not within the normal range of 97 to 100 kPa(abs) [726 to 750 mmHg(abs)] within a minute after the leak detection pump creates negative pressure.

When this malfunction is detected in consecutive drive cycles, the ECM will illuminate the Malfunction Indicator Lamp (MIL) and store the P043F code as a Diagnostic Trouble Code (DTC). The Canister Pump Module, which includes the Canister Pressure Sensor, Leak Detection Pump, and Vent Valve, is responsible for creating the negative pressure in the EVAP system. If you encounter the P043F fault code, it indicates that there is a high flow in the reference orifice of the EVAP system. This can lead to leaks or actuator malfunctions.

It is important to address this issue promptly to ensure the proper functioning of the EVAP system and to prevent any potential damage to the vehicle’s emissions control system.

What are the possible causes of the automobile fault code p043f?

If you’re seeing the engine light on or the service engine soon warning light, the fault code P043F might be the culprit. This code can be caused by a faulty canister pump module, an open or shorted harness, a poor electrical connection in the canister pump module circuit, or even a faulty engine control module (ECM). To fix this issue, start by visually inspecting the wiring harness and connectors. Look out for any damaged components and check for broken, bent, pushed out, or corroded connector pins. Don’t forget to address the possible causes mentioned above.

How can I visually inspect the wiring harness and connectors to fix the p043f fault code?

If you’re dealing with the p043f fault code and your engine light is on, it’s time to take action. The cause could be a faulty canister pump module, an open or shorted harness, a poor electrical connection, or even a faulty engine control module. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage, such as broken or bent pins, corrosion, or components that are out of place. Don’t delay – check these possible causes and get your vehicle back on track.

What should I look for when checking for damaged components and connector’s pins to resolve the p043f fault code?

When resolving the p043f fault code, start by checking for damaged components and connector’s pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any signs of damage such as broken, bent, pushed out, or corroded pins. By doing so, you can identify any issues with the Canister Pump Module harness or circuit, as well as any potential faults with the Engine Control Module (ECM). Don’t forget to address the possible causes mentioned earlier to ensure a thorough inspection.

p043f error fault code explained

If your engine light is on and you’re seeing the P043F fault code, it could be due to a faulty Canister Pump Module or issues with the wiring harness and connectors.

To fix it, visually inspect the wiring and connectors for any damage, and check for broken or corroded pins.

Scroll to Top