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P1845 Infiniti Code - Automatic Transmission Fluid Pressure Switch 5

Quick Answer

The P1845 Infiniti code refers to a problem with the Automatic Transmission Fluid Pressure Switch 5. Common causes include Faulty Automatic Transmission Fluid Pressure Switch 5, Wiring or electrical connection issues, Low transmission fluid levels. 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 Infiniti indicates Automatic Transmission Fluid Pressure Switch 5.
Common causes
Common causes include Faulty Automatic Transmission Fluid Pressure Switch 5, Wiring or electrical connection issues, Low transmission fluid levels.
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 09, 2024
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Code P1845 Infiniti Description

The P1845 Infiniti code refers to a problem 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 onboard computer. The fluid pressure switch helps regulate the transmission's shifting patterns, ensuring smooth operation and optimal performance. When this switch malfunctions or fails, it can lead to a variety of issues that affect the vehicle's overall drivability.

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

Common Causes of P1845 Infiniti

  1. Faulty Automatic Transmission Fluid Pressure Switch 5
  2. Wiring or electrical connection issues
  3. Low transmission fluid levels
  4. Contaminated transmission fluid
  5. Internal transmission problems

Symptoms of P1845 Infiniti

  1. Erratic shifting behavior
  2. Harsh gear changes
  3. Transmission slippage
  4. Check Engine light illuminated

How to Fix P1845 Infiniti

  1. Retrieve the fault code using a diagnostic scan tool
  2. Inspect the wiring and electrical connections related to the pressure switch
  3. Check and replenish transmission fluid levels if low
  4. Replace the Automatic Transmission Fluid Pressure Switch 5 if faulty
  5. Test drive the vehicle to ensure proper operation of the transmission system

Cost to Fix P1845 Infiniti

The cost of repairing the Automatic Transmission Fluid Pressure Switch 5 issue can vary depending on the make and model of the vehicle, the specific parts needed, and the labor rates in your area. On average, the repair cost for this type of problem can range from $200 to $500, including parts and labor. It's important to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on your vehicle's needs. Keep in mind that additional costs may apply if other transmission components require attention.

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Information for Specific Infiniti Models

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 Infiniti Code

1. What does OBDII code P1845 mean on an Infiniti?

Code P1845 indicates a fault with the Automatic Transmission Fluid Pressure Switch 5, which monitors hydraulic pressure in the transmission.

2. What are the symptoms of code P1845 in an Infiniti?

Symptoms may include erratic shifting, transmission slipping, reduced performance, or the transmission entering limp mode. The check engine light may also illuminate.

3. What causes code P1845 in an Infiniti?

Common causes include a faulty transmission fluid pressure switch, wiring or connector issues, low or dirty transmission fluid, or internal transmission problems.

4. Can low transmission fluid cause code P1845?

Yes, insufficient or contaminated transmission fluid can lead to incorrect pressure readings and trigger the P1845 code.

5. How is code P1845 diagnosed in an Infiniti?

A mechanic will use a scan tool to verify the code, inspect the transmission fluid, check the wiring and connectors, and test the pressure switch for proper operation.

6. Can I drive my Infiniti with code P1845?

Driving with this code is not recommended, as it can lead to further transmission damage and reduced vehicle performance.

7. How do you fix code P1845 on an Infiniti?

Repairs may involve replacing the faulty pressure switch, repairing damaged wiring, flushing and refilling the transmission fluid, or addressing internal transmission issues.

8. How much does it cost to fix code P1845 in an Infiniti?

Repair costs vary but typically range from $150 to $400 for pressure switch replacement. Additional costs may apply if further transmission repairs are needed.

9. Can I reset code P1845 without fixing the issue?

Clearing the code without addressing the underlying problem is not advised, as the issue will likely return and could cause further damage.

10. How can I prevent code P1845 in my Infiniti?

Regularly maintain your transmission by checking fluid levels, using the correct fluid type, and addressing transmission issues promptly to avoid pressure-related problems.

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