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Engine-Codes – Generic – P1401

P1401 Code - EGR Temperature Sensor

Quick Answer

The P1401 code indicates a problem with the EGR (Exhaust Gas Recirculation) temperature sensor in the vehicle. Common causes include Faulty EGR temperature sensor, Wiring or electrical connection issues, Carbon buildup or clogging in the EGR system. 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
P1401 indicates EGR Temperature Sensor.
Common causes
Common causes include Faulty EGR temperature sensor, Wiring or electrical connection issues, Carbon buildup or clogging in the EGR system.
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 Aug 20, 2024
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Code P1401 Description

The P1401 code indicates a problem with the EGR (Exhaust Gas Recirculation) temperature sensor in the vehicle. The EGR system is responsible for recirculating a portion of the engine's exhaust gases back into the intake manifold to reduce emissions and control combustion temperatures. The temperature sensor in the EGR system monitors the temperature of the exhaust gases to ensure optimal performance. When the EGR temperature sensor malfunctions or fails, it can lead to issues with engine performance, fuel efficiency, and emissions output.

OBDII Code P1401 - EGR Temperature Sensor
P1401 Code - EGR Temperature Sensor

Common Causes of P1401

  1. Faulty EGR temperature sensor.
  2. Wiring or electrical connection issues.
  3. Carbon buildup or clogging in the EGR system.
  4. Exhaust leaks near the EGR temperature sensor.
  5. Engine overheating causing sensor malfunction.

Symptoms of P1401

  1. Check engine light illuminated on the dashboard.
  2. Decreased fuel efficiency.
  3. Rough idling or stalling.
  4. Engine knocking or pinging noises.
  5. Reduced acceleration and power.

How to Fix P1401

  1. Diagnose the EGR temperature sensor using a scan tool to confirm the code.
  2. Inspect wiring and connections for any damage or corrosion.
  3. Clean or replace the EGR temperature sensor if faulty.
  4. Check and clean the EGR valve and passages for any obstructions.
  5. Clear the code and test drive the vehicle to ensure the issue is resolved.

Cost to Fix P1401

The cost of repairing a P1401 code related to the EGR temperature sensor can vary depending on the make and model of the vehicle, as well as labor rates in your area. On average, the repair costs for this issue can range from $150 to $400, including parts and labor. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location.

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Code P1401 Information for Specific Makes

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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