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P1845 2003 Infiniti G35 Code - Automatic Transmission Fluid Pressure Switch 5

Quick Answer

The P1845 code for a 2003 Infiniti G35 refers to an issue with the Automatic Transmission Fluid Pressure Switch 5. Common causes include Faulty Automatic Transmission Fluid Pressure Switch 5, Wiring issues or poor electrical connection, Problems with the transmission control module. 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
P1845 2003 Infiniti G35 indicates Automatic Transmission Fluid Pressure Switch 5.
Common causes
Common causes include Faulty Automatic Transmission Fluid Pressure Switch 5, Wiring issues or poor electrical connection, Problems with the transmission control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1845 2003 Infiniti G35 Description

The P1845 code for a 2003 Infiniti G35 refers to an issue with the Automatic Transmission Fluid Pressure Switch 5. This switch is responsible for monitoring the fluid pressure within the transmission system and sending signals to the vehicle's computer to ensure smooth shifting and optimal performance. When this switch malfunctions or fails, it can lead to a variety of transmission-related problems that can affect the overall drivability of the vehicle.

OBDII Code P1845 2003 Infiniti G35 - Automatic Transmission Fluid Pressure Switch 5
P1845 2003 Infiniti G35 Code - Automatic Transmission Fluid Pressure Switch 5

Common Causes of P1845 2003 Infiniti G35

  1. Faulty Automatic Transmission Fluid Pressure Switch 5
  2. Wiring issues or poor electrical connection
  3. Problems with the transmission control module
  4. Low transmission fluid levels
  5. Contaminated or degraded transmission fluid

Symptoms of P1845 2003 Infiniti G35

  1. Harsh shifting between gears
  2. Delayed engagement when shifting into gear
  3. Erratic transmission behavior
  4. Transmission slippage
  5. Illumination of the Check Engine Light

How to Fix P1845 2003 Infiniti G35

  1. Begin by conducting a thorough diagnostic scan to confirm the P1845 code and pinpoint the exact cause of the issue.
  2. Inspect the Automatic Transmission Fluid Pressure Switch 5 for any signs of damage or malfunction. Replace the switch if necessary.
  3. Check the wiring and electrical connections related to the switch for any faults or loose connections. Repair or replace as needed.
  4. Inspect the transmission control module for any issues and perform any necessary repairs or reprogramming.
  5. Finally, refill the transmission fluid to the proper level and quality, ensuring that it is clean and free of contaminants.

Cost to Fix P1845 2003 Infiniti G35

The typical repair costs for addressing a P1845 code related to the Automatic Transmission Fluid Pressure Switch 5 in a 2003 Infiniti G35 can range from $200 to $500. This estimate includes the cost of parts such as the pressure switch, any necessary wiring or electrical components, and transmission fluid. Labor costs can vary depending on the shop's hourly rates, but generally fall between $80 and $150 per hour. It's advisable to check with local auto repair shops for a more accurate estimate based on your specific location and vehicle.

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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 P1845 2003 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1845 in a 2003 Infiniti G35 related to the Automatic Transmission Fluid Pressure Switch 5?

- Common symptoms include harsh shifting, transmission slipping, and difficulty changing gears.

2. What can cause OBDII code P1845 to appear in a 2003 Infiniti G35?

- The code P1845 is typically triggered by a malfunction in the Automatic Transmission Fluid Pressure Switch 5, which can be caused by electrical issues or a faulty switch.

3. How can I diagnose the cause of OBDII code P1845 in my 2003 Infiniti G35?

- Diagnosing this code usually involves checking the wiring and connections related to the ATF Pressure Switch 5, as well as testing the switch itself for proper function.

4. Is it safe to continue driving my 2003 Infiniti G35 with OBDII code P1845 present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the transmission and potentially unsafe driving conditions.

5. Can I repair OBDII code P1845 in my 2003 Infiniti G35 on my own?

- Depending on your level of automotive expertise, you may be able to repair this issue on your own by replacing the faulty ATF Pressure Switch 5 or addressing any electrical issues.

6. How much does it typically cost to repair OBDII code P1845 in a 2003 Infiniti G35 at a professional mechanic?

- The cost of repairing this code can vary depending on the cause of the issue, but it may range from $200 to $500 at a professional mechanic.

7. Are there any tips for preventing OBDII code P1845 from reoccurring in my 2003 Infiniti G35?

- Regular maintenance of the transmission system, including checking fluid levels and addressing any leaks promptly, can help prevent the recurrence of this code.

8. What are the long-term effects of ignoring OBDII code P1845 in a 2003 Infiniti G35?

- Ignoring this code can lead to further damage to the transmission system, potentially resulting in costly repairs or even transmission failure over time.

9. Can a faulty Automatic Transmission Fluid Pressure Switch 5 cause other transmission-related issues in a 2003 Infiniti G35?

- Yes, a malfunctioning ATF Pressure Switch 5 can cause a range of transmission issues beyond triggering the OBDII code P1845, affecting overall performance and drivability.

10. How long does it typically take to repair OBDII code P1845 in a 2003 Infiniti G35?

- The repair time can vary based on the specific cause of the issue and the availability of parts, but it may take a few hours to a full day to complete the repair.

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