P043E - OBD II Trouble Code

Our automotive experts have put together the following information about the P043E diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P043E code.

What Does P043E Code Mean?

OBD-II Code P043E is defined as a Evaporative Emission System Leak Detection Reference Orifice

The Leak Detection Pump contains a reference orifice tube. This tube restricts airflow to create a difference of pressure in the EVAP system. If the Orifice tube becomes clogged with debris, the engine computer (PCM) will set code P043E. The orifice tube is replaced as a unit with the leak detection pump module/assembly.

Common Problems That Trigger the P043E Code

• Evap line leak/restriction
• Leak detection pump module failure
• Wiring issue