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  1. Code P0406: Exhaust Gas Recirculation Sensor A Circuit High

    Learn what Trouble Code P0406 means, the cause, and how to fix it.

  2. P0406 Code Meaning, Causes, Symptoms & Tech Notes

    When the sensor detects that the voltage in the circuit is too high, it triggers the P0406 code. Diagnose the issue using a scan tool to confirm the P0406 code and pinpoint the exact cause. Inspect the …

  3. P0406 – Meaning, Causes, Symptoms, & Fixes - Fixd App

    Mar 25, 2022 · Engine code P0406 could be caused by a number of things, including a bad EGR valve, faulty wiring, or carbon buildup inside the EGR valve. If you’d like to try to fix code P0406 at home …

  4. P0406 Code: Meaning, Symptoms, Causes, & Fixes - Mechanical Boost

    What does the P0406 Code mean? P0406 code indicates that your powertrain control module (PCM) detects a high voltage signal from the exhaust gas recirculation (EGR) sensor A.

  5. P0406 Exhaust Gas Recirculation Sensor A Circuit High

    Detailed information on troubleshooting and repairing a P0406 DTC code which has to do with the EGR sensor A circuit high. Also includes links to relevant forum topics on the code.

  6. P0406 Code Fix Guide: EGR Sensor "A" Circuit High Explained

    Jun 20, 2025 · The P0406 fault code indicates a problem with the EGR system, specifically the EGR position sensor. While this problem may seem tricky, most repairs, such as cleaning the EGR …

  7. OBD2 Code P0406 – Causes, Symptoms, and Repairs

    Sep 17, 2025 · Learn all about the P0406 code, what causes Exhaust Gas Recirculation Sensor "A" Circuit High, and how to diagnose and fix common issues to maintain optimal engine performance.

  8. P0406 – OBD ADVISOR

    Potential causes of a P0406 code include: How Can You Fix The P0406 Code? If the vehicle starts and stalls or will not run with this code present, try unplugging the EGR valve and then restarting. If this …

  9. P0406 Code – What Does It Mean & How To Fix It - OBD2PROS

    Diagnosing and fixing a P0406 trouble code isn’t as difficult as it seems, especially with the help of this guide. We also provided its common causes.

  10. P0406 Code: Exhaust Gas Recirculation Sensor A Circuit High

    Aug 13, 2024 · Address the P0406 code by learning about its meaning, possible causes, common symptoms, and more. Read on for more information.