Code P0403: Exhaust Gas Recirculation Circuit Malfunction
Any issue with this circuit triggers trouble code P0403. So, what does the code P0403 mean? It’s most likely an electrical issue, but it could be a sign that your EGR system isn’t working …
P0403 Code Meaning, Causes, Symptoms & Tech Notes
Aug 19, 2024 · The P0403 code indicates a malfunction in the Exhaust Gas Recirculation (EGR) circuit. The EGR system is responsible for recirculating a portion of the engine's exhaust gas …
P0403 Code: Meaning, Symptoms, Causes & Fixes - Mechanical …
When the powertrain control module (PCM) detects that your EGR system is not working according to the requirements, it sets the P0403 code. This article mainly explains the P0403 …
How to Fix the P0403 Code: EGR Control Circuit Malfunction
Jun 5, 2025 · Definition : The P0403 code means Exhaust Gas Recirculation (EGR) “A” Control Circuit Malfunction . This means that the vehicle's EGR system is not working properly due to …
OBD-II Trouble Code: P0403 Exhaust Gas Recirculation Circuit Malfunction
What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps …
P0403 – Exhaust Gas Recirculation A Control Circuit/Open
What does the P0403 code mean? The P0403 code indicates a problem within the exhaust gas recirculation (EGR) circuit. It specifically points to an open control circuit, meaning there’s a …
How to Fix a P0403 EGR Circuit Malfunction - Engineer Fix
Jan 2, 2026 · P0403 is a specialized DTC indicating a problem with the electrical circuit responsible for controlling the Exhaust Gas Recirculation (EGR) system. This code directs …
P0403 Code – What Does It Mean & How To Fix It - OBD2PROS
This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.
P0403 - Exhaust Gas Recirculation "A" Control Circuit - RepairPal
Learn about P0403 symptoms, causes, and potential solutions from the diagnostic experts at RepairPal.
OBD2 Code P0403 – Causes, Symptoms, and Repairs
Sep 17, 2025 · Learn all about the P0403 code, what causes exhaust gas recirculation circuit malfunctions, and how to diagnose and fix common issues to maintain optimal engine …