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P1406 Audi Code - EGR Temperature Sensor Signal Range Performance

Quick Answer

The P1406 Audi code indicates a problem with the EGR (Exhaust Gas Recirculation) temperature sensor signal range performance. Common causes include Faulty EGR temperature sensor, Wiring issues in the EGR temperature sensor circuit, Carbon buildup 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
P1406 Audi indicates EGR Temperature Sensor Signal Range Performance.
Common causes
Common causes include Faulty EGR temperature sensor, Wiring issues in the EGR temperature sensor circuit, Carbon buildup 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 Sep 10, 2024
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Code P1406 Audi Description

The P1406 Audi code indicates a problem with the EGR (Exhaust Gas Recirculation) temperature sensor signal range performance. The EGR system is responsible for recirculating a portion of the exhaust gases back into the engine cylinders to reduce emissions and control combustion temperatures. The EGR temperature sensor monitors the temperature of the exhaust gases entering the EGR system.

OBDII Code P1406 Audi - EGR Temperature Sensor Signal Range Performance
P1406 Audi Code - EGR Temperature Sensor Signal Range Performance

Common Causes of P1406 Audi

  1. Faulty EGR temperature sensor
  2. Wiring issues in the EGR temperature sensor circuit
  3. Carbon buildup in the EGR system
  4. EGR valve malfunction
  5. Exhaust gas leaks

Symptoms of P1406 Audi

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Poor acceleration
  4. Engine misfires
  5. Engine overheating

How to Fix P1406 Audi

  1. Diagnose the EGR temperature sensor and related components to pinpoint the exact cause of the issue.
  2. Replace the faulty EGR temperature sensor if it is found to be the root cause of the problem.
  3. Check and repair any wiring issues in the EGR temperature sensor circuit.
  4. Clean or replace the EGR valve if necessary.
  5. Clear the diagnostic trouble codes from the ECM and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1406 Audi

The cost of repairing the P1406 Audi code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of issue can range from $200 to $500, including parts and labor. It is important to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's make and model. Additionally, factors such as the severity of the issue and any additional repairs needed can also impact the total cost.

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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.

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