AutoCodes – Nissan – P1402 2006 Nissan Maxima

P1402 2006 Nissan Maxima Code - EGR Function Open

Quick Answer

This system controls flow rate of Exhaust Gas Recirculation (EGR) led from exhaust manifold to intake manifold. Common causes include Faulty EGR temperature sensor, EGR volume control valve harness is open or shorted, EGR volume control valve 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 2006 Nissan Maxima indicates EGR Function Open.
Common causes: Common causes include Faulty EGR temperature sensor, EGR volume control valve harness is open or shorted, EGR volume control valve 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.

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Code Popularity 5,975

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 01, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1402 2006 Nissan Maxima Description

This system controls flow rate of Exhaust Gas Recirculation (EGR) led from exhaust manifold to intake manifold. The opening of the EGR by-pass passage in the EGR volume control valve changes to control the flow rate. A built-in step motor moves the valve in steps corresponding to the Engine Control Module (ECM) output pulses. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. The EGR volume control valve remains closed under the following conditions.
- Engine stopped
- Engine starting
- Engine idling
- Low engine coolant temperature
- Excessively high engine coolant temperature
- High engine speed
- Wide open throttle
- Low battery voltage

OBDII Code P1402 2006 Nissan Maxima - EGR Function Open - AutoCodes.com — P1402 2006 Nissan Maxima Code - EGR Function Open

What does this mean?

What are the Possible Causes of the DTC P1402 2006 Nissan Maxima?

Faulty EGR temperature sensor
EGR volume control valve harness is open or shorted
EGR volume control valve circuit poor electrical connection
EGR volume control valve leaking or stuck open

How to Fix the DTC P1402 2006 Nissan Maxima?

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 does this mean?

Code Tech Notes

Start by cleaning the EGR valve, if the code persists it may be necessary to replace the EGR Valve.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1402 2006 Nissan Maxima 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.

Need more information about the P1402 2006 Nissan Maxima code?

Need more information on how to fix the P1402 2006 Nissan Maxima code? Get Access to Factory Service Manuals

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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 2006 Nissan Maxima Code

1. What does the OBDII code P1402 mean on a 2006 Nissan Maxima?

P1402 indicates an issue with the Exhaust Gas Recirculation (EGR) system, specifically that the EGR function is open or not operating as expected.

2. What are the common symptoms of code P1402 on a 2006 Nissan Maxima?

Symptoms may include a lit Check Engine Light, rough idling, poor fuel economy, reduced engine performance, and potential engine hesitation during acceleration.

3. What causes the P1402 code on a 2006 Nissan Maxima?

Common causes include a clogged EGR valve, faulty EGR temperature sensor, damaged vacuum lines, carbon buildup in the EGR system, or wiring issues in the EGR circuit.

4. Can driving with code P1402 damage my 2006 Nissan Maxima?

Driving with P1402 may not immediately damage the vehicle but can lead to poor performance, increased emissions, and potential long-term engine issues if not resolved.

5. How do I fix the P1402 code on my 2006 Nissan Maxima?

Repairs may involve cleaning or replacing the EGR valve, inspecting and repairing vacuum lines, clearing carbon buildup, or replacing faulty sensors or wiring in the EGR system.

6. How do I diagnose the P1402 code on a 2006 Nissan Maxima?

Start by inspecting the EGR valve for carbon buildup, check the vacuum lines for leaks or damage, test the EGR temperature sensor, and inspect the wiring and connectors for faults.

7. Can I clean the EGR valve to fix the P1402 code on my 2006 Nissan Maxima?

Yes, cleaning the EGR valve can often resolve the issue if the problem is due to carbon buildup. However, if the valve is damaged or stuck, replacement may be necessary.

8. How much does it cost to fix the P1402 code on a 2006 Nissan Maxima?

Repair costs can range from $100 to $400, depending on whether cleaning, part replacement, or professional diagnostics are required.

9. Will clearing the P1402 code with a scan tool fix the problem?

Clearing the code will temporarily turn off the Check Engine Light, but the root cause must be addressed to prevent the code from returning.

10. Is the P1402 code related to emissions testing on my 2006 Nissan Maxima?

Yes, the P1402 code affects the EGR system, which is part of the emissions control system. This code could cause your vehicle to fail an emissions test.