Nov 10, 2025 · Learn the meaning and causes of the P0405 code and how to fix it to restore smooth engine operation and reduce emissions.

Sep 8, 2024 · The P0405 code indicates a problem with the Exhaust Gas Recirculation (EGR) sensor 'A' circuit being lower than the expected voltage range. The EGR system is crucial for reducing …

Oct 31, 2023 · Specifically, a P0405 code indicates a problem in the EGR circuit, which affects exhaust output. Read on to learn the specific causes of a P0405 code, how serious it is, and how to properly …

DTC Code P0405: Exhaust Gas Recirculation Sensor (Circuit A) Low. The diagnostic trouble code P0405 indicates that the Exhaust Gas Recirculation (EGR) position is below the specifications of the …

Detailed information on troubleshooting and repairing a P0405 DTC code which has to do with the EGR Circuit Sensor A. Also includes links to relevant forum topics on the code.

Have you just come across a P0405 code and don’t know where to turn? Our code experts dive in to give you the guidelines needed to address the OBD code issue.

Jun 20, 2025 · When your engine lights up and the P0405 code appears, you may be in a dilemma: should you replace the EGR valve directly or try to clean it first? One car owner shared his …

May 21, 2024 · If you’ve got a P0405 code showing up on your car, this guide is for you. We’ll break down what it means, its symptoms, causes, and how to fix it. As an ASE-certified mechanic, I’ve …

If you have a P0405 code, the problem is most often caused by a bad EGR position sensor. To fix the problem you have to replace the valve.

Learn about P0405 symptoms, causes, and potential solutions from the diagnostic experts at RepairPal.