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P0406 2005 Nissan Maxima Code - Exhaust Gas Recirculation Temperature Sensor Circuit High Input

Quick Answer

The P0406 diagnostic trouble code (DTC) for a 2005 Nissan Maxima indicates a problem with the Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit registering a high input. Common causes include Faulty EGR temperature sensor, Damaged or corroded wiring in the EGR temperature sensor circuit, Carbon buildup in the EGR system affecting sensor readings. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0406 2005 Nissan Maxima indicates Exhaust Gas Recirculation Temperature Sensor Circuit High Input.
Common causes
Common causes include Faulty EGR temperature sensor, Damaged or corroded wiring in the EGR temperature sensor circuit, Carbon buildup in the EGR system affecting sensor readings.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0406 2005 Nissan Maxima Description

The P0406 diagnostic trouble code (DTC) for a 2005 Nissan Maxima indicates a problem with the Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit registering a high input. The EGR system is designed to reduce nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the intake manifold. The EGR temperature sensor monitors the temperature of the exhaust gases entering the EGR system.

OBDII Code P0406 2005 Nissan Maxima - Exhaust Gas Recirculation Temperature Sensor Circuit High Input
P0406 2005 Nissan Maxima Code - Exhaust Gas Recirculation Temperature Sensor Circuit High Input

Common Causes of P0406 2005 Nissan Maxima

  1. Faulty EGR temperature sensor.
  2. Damaged or corroded wiring in the EGR temperature sensor circuit.
  3. Carbon buildup in the EGR system affecting sensor readings.
  4. Malfunctioning EGR valve.
  5. Issues with the ECM controlling the EGR system.

Symptoms of P0406 2005 Nissan Maxima

  1. Check Engine Light illuminated on the dashboard.
  2. Reduced fuel efficiency.
  3. Rough idling or engine misfires.
  4. Engine knocking or pinging noises.
  5. Engine stalling or hesitation during acceleration.

How to Fix P0406 2005 Nissan Maxima

  1. Begin by diagnosing the EGR temperature sensor circuit using a scan tool to confirm the P0406 code.
  2. Inspect the wiring harness and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the EGR temperature sensor for proper resistance and voltage readings, replacing if faulty.
  4. Clean the EGR valve and passages to ensure proper flow of exhaust gases.
  5. Clear the DTC and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0406 2005 Nissan Maxima

The typical repair costs for addressing a P0406 code on a 2005 Nissan Maxima can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's recommended to check local rates for a more accurate estimate.

When is the Code Detected?

An improper voltage signal is sent to ECM through the valve

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0406 2005 Nissan Maxima Code

1. What are the common symptoms of OBDII code P0406 on a 2005 Nissan Maxima?

Common symptoms include the Check Engine Light illuminating, reduced engine performance, rough idling, and potentially increased fuel consumption.

2. What does the OBDII code P0406 for a 2005 Nissan Maxima indicate?

The code P0406 indicates a high input signal from the Exhaust Gas Recirculation (EGR) temperature sensor circuit.

3. What are the possible causes of OBDII code P0406 on a 2005 Nissan Maxima?

Possible causes include a faulty EGR temperature sensor, damaged wiring or connectors in the sensor circuit, or a problem with the EGR valve itself.

4. How can I diagnose the OBDII code P0406 on my 2005 Nissan Maxima?

Diagnosis typically involves using a scan tool to read the code, checking the EGR temperature sensor and its wiring for damage, and testing the EGR valve for proper operation.

5. Can I drive my 2005 Nissan Maxima with OBDII code P0406?

It is not recommended to drive the vehicle with a persistent P0406 code, as it can lead to reduced engine performance and potential long-term damage if left unresolved.

6. How serious is OBDII code P0406 on a 2005 Nissan Maxima?

While the code itself may not cause immediate harm to the vehicle, it can impact engine performance and emissions if not addressed promptly.

7. How can I repair OBDII code P0406 on my 2005 Nissan Maxima?

Repair options may include replacing the EGR temperature sensor, repairing damaged wiring or connectors, or addressing any issues with the EGR valve.

8. Can I clear the OBDII code P0406 on my 2005 Nissan Maxima with a simple reset?

While clearing the code may temporarily turn off the Check Engine Light, it is recommended to diagnose and address the root cause of the issue to prevent it from reoccurring.

9. Is it possible to prevent OBDII code P0406 from appearing on my 2005 Nissan Maxima?

Regular maintenance, such as cleaning the EGR system components and ensuring proper wiring connections, can help prevent issues that may trigger the P0406 code.

10. Should I seek professional help for OBDII code P0406 on my 2005 Nissan Maxima?

If you are unsure about diagnosing or repairing the issue yourself, it is advisable to consult a qualified mechanic or technician to properly address the P0406 code.

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