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P1402 Mazda Code - EGR Valve Position Sensor Circuit

Quick Answer

The P1402 code for Mazda vehicles refers to an issue with the EGR (Exhaust Gas Recirculation) Valve Position Sensor Circuit. Common causes include Faulty EGR valve position sensor, Wiring issues in the 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
P1402 Mazda indicates EGR Valve Position Sensor Circuit.
Common causes
Common causes include Faulty EGR valve position sensor, Wiring issues in the 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 08, 2024
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Code P1402 Mazda Description

The P1402 code for Mazda vehicles refers to an issue with the EGR (Exhaust Gas Recirculation) Valve Position Sensor Circuit. The EGR system is responsible for recirculating a portion of exhaust gases back into the engine's intake manifold to reduce emissions and improve fuel efficiency. The EGR valve position sensor monitors the position of the valve to ensure it is functioning properly.

OBDII Code P1402 Mazda - EGR Valve Position Sensor Circuit
P1402 Mazda Code - EGR Valve Position Sensor Circuit

Common Causes of P1402 Mazda

  1. Faulty EGR valve position sensor
  2. Wiring issues in the sensor circuit
  3. Carbon buildup in the EGR system
  4. Vacuum leaks in the EGR system
  5. Malfunctioning EGR valve

Symptoms of P1402 Mazda

  1. Rough idling
  2. Engine misfiring
  3. Hesitation or lack of power during acceleration
  4. Decreased fuel efficiency
  5. Engine stalling or failure to start

How to Fix P1402 Mazda

  1. Use an OBD-II scanner to confirm the P1402 code and diagnose the specific issue with the EGR valve position sensor circuit.
  2. Inspect the sensor, wiring, and EGR valve for any visible damage or signs of malfunction.
  3. Clean or replace the EGR valve position sensor if it is faulty.
  4. Repair any damaged wiring in the sensor circuit.
  5. Test the EGR system to ensure proper functionality after repairs are completed.

Cost to Fix P1402 Mazda

The typical repair costs for addressing a P1402 code related to the EGR Valve Position Sensor Circuit can range from $200 to $500, including parts and labor. However, it is essential 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, but rates may differ based on the factors mentioned above. It is advisable to check with local auto repair shops for a more accurate estimate based on your specific circumstances.

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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 P1402 Mazda Code

1. What does the OBDII code P1402 mean for a Mazda?

It indicates an issue with the EGR Valve Position Sensor Circuit, which monitors the position of the EGR valve to ensure proper function.

2. What are the common symptoms of code P1402 in a Mazda?

Symptoms may include engine hesitation, rough idle, reduced fuel efficiency, and the Check Engine Light illuminating.

3. What causes the P1402 code to appear on a Mazda?

Common causes include a faulty EGR valve position sensor, wiring issues, corrosion in the connector, or a malfunctioning EGR valve.

4. Can I drive my Mazda with the P1402 code?

While the vehicle may still be drivable, ignoring the code can lead to increased emissions, poor engine performance, and potential damage to the engine over time.

5. How do I fix the P1402 code in a Mazda?

Repairs typically involve inspecting and replacing the EGR valve position sensor, cleaning any carbon buildup in the EGR system, or repairing damaged wiring.

6. How do I test the EGR valve position sensor for code P1402?

Use a multimeter to check the resistance and voltage of the sensor against the manufacturer’s specifications, or consult a repair manual for exact procedures.

7. Can cleaning the EGR valve help clear the P1402 code on a Mazda?

Yes, cleaning carbon buildup in the EGR valve and its passages can sometimes resolve the issue if the sensor itself is still functional.

8. How much does it cost to repair the P1402 code on a Mazda?

Costs vary, but replacing the EGR valve position sensor typically ranges from $100 to $300, depending on labor and parts.

9. Will resetting the Check Engine Light clear the P1402 code permanently?

Resetting the light may clear the code temporarily, but if the underlying issue isn’t fixed, the code will return.

10. Is the P1402 code related to emissions problems?

Yes, a malfunctioning EGR system can lead to increased NOx emissions and may cause the vehicle to fail an emissions test.

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