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P0405 Nissan Code - Exhaust Gas Recirculation Temperature Sensor Circuit Low Input

Quick Answer

The P0405 diagnostic trouble code (DTC) for Nissan vehicles refers to the Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit Low Input. Common causes include Faulty EGR temperature sensor, Wiring or connector issues in the EGR temperature sensor circuit, EGR temperature sensor out of calibration. 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
P0405 Nissan indicates Exhaust Gas Recirculation Temperature Sensor Circuit Low Input.
Common causes
Common causes include Faulty EGR temperature sensor, Wiring or connector issues in the EGR temperature sensor circuit, EGR temperature sensor out of calibration.
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 09, 2024
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Code P0405 Nissan Description

The P0405 diagnostic trouble code (DTC) for Nissan vehicles refers to the Exhaust Gas Recirculation (EGR) Temperature Sensor Circuit Low Input. This code indicates that the EGR temperature sensor is sending a signal to the engine control module (ECM) that is lower than the expected range. The EGR system plays a crucial role in reducing nitrogen oxide (NOx) emissions by recirculating a portion of the exhaust gases back into the intake manifold to be re-burned in the combustion process. The EGR temperature sensor is responsible for monitoring the temperature of the exhaust gases before they are recirculated to ensure optimal engine performance and emissions control.

OBDII Code P0405 Nissan - Exhaust Gas Recirculation Temperature Sensor Circuit Low Input
P0405 Nissan Code - Exhaust Gas Recirculation Temperature Sensor Circuit Low Input

Common Causes of P0405 Nissan

  1. Faulty EGR temperature sensor
  2. Wiring or connector issues in the EGR temperature sensor circuit
  3. EGR temperature sensor out of calibration
  4. ECM software or hardware malfunction
  5. Carbon buildup or debris affecting sensor operation

Symptoms of P0405 Nissan

  1. Check Engine Light illuminated
  2. Reduced fuel efficiency
  3. Rough idling or stalling
  4. Decreased engine performance
  5. Increased emissions output

How to Fix P0405 Nissan

  1. Diagnose the issue by using a scan tool to retrieve the DTC and inspect the EGR temperature sensor and circuit for any visible damage or corrosion.
  2. Test the EGR temperature sensor's resistance and compare it to specifications to determine if it is faulty.
  3. Check the wiring and connectors for any breaks, frays, or loose connections. Repair or replace damaged components as needed.
  4. Clean the EGR temperature sensor and surrounding area to remove any carbon buildup or debris that may be affecting its operation.
  5. Reset the ECM after completing repairs and test drive the vehicle to ensure the P0405 code does not return.

Cost to Fix P0405 Nissan

The typical repair costs for addressing the P0405 code on a Nissan vehicle can range from $150 to $400, depending on the extent of the issue and the specific components that require replacement. This estimate includes parts and labor, but the final cost may vary based on the shop's hourly labor rates, the location of the repair facility, and the availability of replacement parts. It is advisable to consult with a reputable auto repair shop for a more accurate cost estimate tailored to your vehicle's make and model. Keep in mind that diagnostic time and labor rates can fluctuate, so it's essential to inquire about these factors before proceeding with the repair.

When is the Code Detected?

An improper voltage signal is sent to ECM through the valve

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Information for Specific Nissan Models

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.

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