P1402 Mazda Code - EGR Valve Position Sensor Circuit
Quick Answer
P1402 Mazda indicates EGR Valve Position Sensor Circuit. Common causes include Faulty Diagnostic Module Tank Leakage (DMTL), Diagnostic Module Tank Leakage harness is open or shorted, Diagnostic Module Tank Leakage circuit poor electrical connection. 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 Diagnostic Module Tank Leakage (DMTL), Diagnostic Module Tank Leakage harness is open or shorted, Diagnostic Module Tank Leakage circuit poor electrical connection.
- 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.
Code P1402 Mazda Description
What are the Possible Causes of the DTC P1402 Mazda?
- Faulty Diagnostic Module Tank Leakage (DMTL)
- Diagnostic Module Tank Leakage harness is open or shorted
- Diagnostic Module Tank Leakage circuit poor electrical connection
How to Fix the DTC P1402 Mazda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1402 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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