AutoCodes – Nissan – P1402 2004 Nissan Maxima

P1402 2004 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 2004 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 6,157

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 2004 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 2004 Nissan Maxima - EGR Function Open - AutoCodes.com — P1402 2004 Nissan Maxima Code - EGR Function Open

What does this mean?

What are the Possible Causes of the DTC P1402 2004 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 2004 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.

There is a factory service bulletin for the 2004 Nissan Maxima:
2004 Nissan Maxima Factory Service Bulletin OBDII Code P1402

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1402 2004 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 2004 Nissan Maxima code?

Need more information on how to fix the P1402 2004 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 2004 Nissan Maxima Code

1. What does the OBDII code P1402 on a 2004 Nissan Maxima mean?

The P1402 code on a 2004 Nissan Maxima indicates an issue with the EGR (Exhaust Gas Recirculation) function being open.

2. What are the common symptoms of a P1402 code in a 2004 Nissan Maxima?

Common symptoms of the P1402 code may include rough idling, decreased engine performance, and potentially increased emissions.

3. What are the possible causes of a P1402 code on a 2004 Nissan Maxima?

Possible causes of the P1402 code include a faulty EGR valve, a clogged EGR passage, electrical issues in the EGR system, or a vacuum leak in the system.

4. How do you diagnose a P1402 code on a 2004 Nissan Maxima?

Diagnosing a P1402 code typically involves using a scan tool to read the code, checking the EGR valve and passage for blockages, inspecting the electrical connections, and testing the vacuum system.

5. Can a P1402 code on a 2004 Nissan Maxima be fixed at home?

Depending on the exact cause of the P1402 code, some DIY-friendly fixes include cleaning or replacing the EGR valve, clearing any blockages in the EGR passage, or repairing damaged wiring in the EGR system.

6. Is it safe to continue driving with a P1402 code on a 2004 Nissan Maxima?

It is not recommended to drive for an extended period with a P1402 code, as it can lead to decreased fuel efficiency, engine performance issues, and potential damage to other components over time.

7. How much does it typically cost to repair a P1402 code on a 2004 Nissan Maxima?

The cost of repairing a P1402 code can vary depending on the exact cause, but it may range from $100 to $500 or more, including parts and labor.

8. How long does it take to fix a P1402 code on a 2004 Nissan Maxima?

The repair time for a P1402 code can vary based on the specific issue but may take anywhere from 1 to 3 hours at a repair shop.

9. Can a P1402 code on a 2004 Nissan Maxima cause other problems if not addressed promptly?

Ignoring a P1402 code can potentially lead to increased emissions, reduced fuel efficiency, and further damage to engine components over time.

10. Are there any preventive measures to avoid a P1402 code on a 2004 Nissan Maxima?

Regular maintenance, such as cleaning the EGR system components and following the manufacturer's recommended service schedule, can help prevent issues that may trigger a P1402 code.