AutoCodes – Nissan – P1402 2002 Nissan Sentra

P1402 2002 Nissan Sentra 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 2002 Nissan Sentra 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 6,193

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 2002 Nissan Sentra 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 2002 Nissan Sentra - EGR Function Open - AutoCodes.com — P1402 2002 Nissan Sentra Code - EGR Function Open

What does this mean?

What are the Possible Causes of the DTC P1402 2002 Nissan Sentra?

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 2002 Nissan Sentra?

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 2002 Nissan Sentra 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 2002 Nissan Sentra code?

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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 2002 Nissan Sentra Code

1. What are the common symptoms of OBDII code P1402 in a 2002 Nissan Sentra?

The common symptoms of code P1402 in a 2002 Nissan Sentra may include rough idling, decreased engine performance, and an illuminated check engine light.

2. What does the OBDII code P1402 "EGR Function Open" mean in a 2002 Nissan Sentra?

The code P1402 in a 2002 Nissan Sentra indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system, specifically that the EGR function is open when it should be closed.

3. What are the possible causes of OBDII code P1402 in a 2002 Nissan Sentra?

Possible causes of code P1402 in a 2002 Nissan Sentra include a faulty EGR valve, clogged EGR passages, wiring issues, or a malfunctioning EGR temperature sensor.

4. How can I diagnose the OBDII code P1402 in my 2002 Nissan Sentra?

Diagnosing code P1402 in a 2002 Nissan Sentra typically involves checking the EGR valve for proper functioning, inspecting the EGR passages for blockages, and testing the EGR temperature sensor and related wiring.

5. Can I continue driving my 2002 Nissan Sentra with OBDII code P1402?

It is not recommended to continue driving your 2002 Nissan Sentra with code P1402, as it can lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter.

6. How can I repair OBDII code P1402 in a 2002 Nissan Sentra?

Repairing code P1402 in a 2002 Nissan Sentra may involve replacing the EGR valve, cleaning out any clogged EGR passages, repairing faulty wiring, or replacing the EGR temperature sensor.

7. Will resetting the check engine light fix OBDII code P1402 in my 2002 Nissan Sentra?

Simply resetting the check engine light will not fix code P1402 in a 2002 Nissan Sentra. It is important to diagnose the underlying issue causing the code and address it appropriately.

8. How much does it cost to repair OBDII code P1402 in a 2002 Nissan Sentra?

The cost to repair code P1402 in a 2002 Nissan Sentra can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P1402 in a 2002 Nissan Sentra?

While some DIY enthusiasts may be able to address simpler issues related to code P1402, it is recommended to consult a professional mechanic for a proper diagnosis and repair to ensure the problem is resolved correctly.

10. How often does OBDII code P1402 occur in a 2002 Nissan Sentra?

Code P1402 "EGR Function Open" in a 2002 Nissan Sentra can occur due to various reasons, but it is not considered a common code compared to other more prevalent issues in the vehicle's diagnostic system.