AutoCodes – Nissan – P1623 Nissan

P1623 Nissan Code - Injector Adjustment Value

Quick Answer

Injector adjustment value indicates manufacturing tolerance, and the value is printed on the top of fuel injector. Common causes include Faulty Engine Control Module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1623 Nissan indicates Injector Adjustment Value.
Common causes: Common causes include Faulty Engine Control Module (ECM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,040

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 27, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1623 Nissan Description

Injector adjustment value indicates manufacturing tolerance, and the value is printed on the top of fuel injector. The injector adjustment value which is correctly stored in Engine Control Module (ECM) is needed for precise fuel injection control.
A performance of emission control and drivability may affect when there is a mismatch between the following
two values.
- The injector adjustment value stored in ECM
- The injector adjustment value of the fuel injector which is installed on the vehicle
The Diagnostic Trouble Code (DTC) will be set when the ECM detects the abnormal value of injector adjustment value.

OBDII Code P1623 Nissan - Injector Adjustment Value - AutoCodes.com — P1623 Nissan Code - Injector Adjustment Value

What does this mean?

What are the Possible Causes of the DTC P1623 Nissan?

Faulty Engine Control Module (ECM)

How to Fix the DTC P1623 Nissan?

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 P1623 Nissan 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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Need more information on how to fix the P1623 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1623 Nissan code diagnosed by a professional: Find a repair shop in your area

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 P1623 Nissan Code

1. What are the common symptoms of OBDII code P1623 on a Nissan related to Injector Adjustment Value?

The common symptoms include rough idling, engine misfires, poor acceleration, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P1623 related to Injector Adjustment Value in a Nissan?

Possible causes include a faulty fuel injector, wiring issues in the injector circuit, a malfunctioning Engine Control Module (ECM), or a problem with the fuel system.

3. How can I diagnose the OBDII code P1623 on my Nissan related to Injector Adjustment Value?

Diagnosis typically involves using a scan tool to read the code, checking the fuel injectors for proper function, inspecting the wiring for any damage, and testing the ECM for faults.

4. Can a DIY enthusiast repair OBDII code P1623 on a Nissan related to Injector Adjustment Value?

While some basic checks like inspecting the wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing more complex issues may require professional help to ensure accurate and effective repairs.

5. Are there any specific repair tips for addressing OBDII code P1623 on a Nissan related to Injector Adjustment Value?

Ensure all wiring connections related to the fuel injectors are secure and undamaged, consider testing the fuel injectors for proper operation, and consult a professional if the issue persists after basic checks.

6. Is it safe to continue driving my Nissan with OBDII code P1623 related to Injector Adjustment Value?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the engine and potentially compromise driving safety.

7. How urgent is it to address OBDII code P1623 on a Nissan related to Injector Adjustment Value?

It is advisable to address this code promptly to prevent potential engine performance issues and avoid more costly repairs in the future.

8. Can resetting the ECM clear the OBDII code P1623 related to Injector Adjustment Value on a Nissan?

Resetting the ECM may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear after some driving cycles.

9. Will OBDII code P1623 on a Nissan related to Injector Adjustment Value cause a significant decrease in fuel efficiency?

Yes, this code can lead to decreased fuel efficiency due to improper fuel injection, leading to inefficient combustion and engine performance.

10. How much can I expect to pay for repairing OBDII code P1623 related to Injector Adjustment Value on a Nissan?

The cost of repair can vary depending on the specific cause of the code, but it is recommended to budget for diagnostic fees, parts replacement costs, and labor charges, which can add up to a few hundred dollars.