AutoCodes – Infiniti – P1815 2003 Infiniti G35

P1815 2003 Infiniti G35 Code - Manual Mode Switch

Quick Answer

Manual Mode Switch is installed in A/T device. Common causes include Faulty Manual Mode Switch (Built into A/T control device), Faulty Position Select Switch (Built into A/T control device), Manual Mode Switch harness is open or shorted. 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: P1815 2003 Infiniti G35 indicates Manual Mode Switch.
Common causes: Common causes include Faulty Manual Mode Switch (Built into A/T control device), Faulty Position Select Switch (Built into A/T control device), Manual Mode Switch harness is open or shorted.
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 5,854

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 Sep 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1815 2003 Infiniti G35 Description

Manual Mode Switch is installed in A/T device. It sends manual mode switch, shift up and shift down switch signals to Transmission Control Module (TCM). TCM sends the switch signals to combination meter. by CAN communication line. Then manual mode switch position is indicated on the A/T indicator.

OBDII Code P1815 2003 Infiniti G35 - Manual Mode Switch - AutoCodes.com — P1815 2003 Infiniti G35 Code - Manual Mode Switch

What does this mean?

What are the Possible Causes of the DTC P1815 2003 Infiniti G35?

Faulty Manual Mode Switch (Built into A/T control device)
Faulty Position Select Switch (Built into A/T control device)
Manual Mode Switch harness is open or shorted
Manual Mode Switch circuit poor electrical connection

How to Fix the DTC P1815 2003 Infiniti G35?

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 P1815 2003 Infiniti G35 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 P1815 2003 Infiniti G35 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 P1815 2003 Infiniti G35 Code

1. What is OBDII code P1815 on a 2003 Infiniti G35 related to?

The P1815 code on a 2003 Infiniti G35 is related to the Manual Mode Switch.

2. What are the common symptoms of OBDII code P1815 in a 2003 Infiniti G35?

Common symptoms of code P1815 may include difficulty shifting gears, the transmission staying in one gear, or the vehicle going into limp mode.

3. What causes OBDII code P1815 to trigger in a 2003 Infiniti G35?

The Manual Mode Switch can trigger the P1815 code due to issues with the switch itself, wiring problems, or issues with the transmission control module.

4. How can I diagnose the Manual Mode Switch issue causing OBDII code P1815 in my 2003 Infiniti G35?

Diagnosing the Manual Mode Switch involves checking the switch itself for physical damage, inspecting the wiring for any shorts or breaks, and using a scan tool to monitor the switch's operation.

5. Can I still drive my 2003 Infiniti G35 with OBDII code P1815?

It is not recommended to drive your vehicle with code P1815 as it can lead to further transmission issues and potentially cause safety hazards.

6. How can I repair OBDII code P1815 on my 2003 Infiniti G35?

Repairing code P1815 may involve replacing the Manual Mode Switch if it's faulty, repairing any damaged wiring, or reprogramming the transmission control module.

7. Is it possible to reset OBDII code P1815 on a 2003 Infiniti G35 without fixing the underlying issue?

Resetting the code without fixing the underlying issue will only temporarily clear the fault code. The issue causing the code will likely trigger it again until properly addressed.

8. Can a DIY enthusiast fix OBDII code P1815 on a 2003 Infiniti G35?

Depending on your mechanical skills and access to tools, a DIY enthusiast may be able to diagnose and repair code P1815 by following repair guides and using proper diagnostic equipment.

9. Will fixing OBDII code P1815 improve the performance of my 2003 Infiniti G35?

Fixing code P1815 can improve the performance of your vehicle by ensuring proper transmission operation and preventing potential damage to the transmission system.

10. How long does it usually take to repair OBDII code P1815 on a 2003 Infiniti G35?

The time to repair code P1815 can vary depending on the exact cause of the issue. It may take a few hours to a day to diagnose and repair the problem effectively.