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P0845 Nissan Code - Transmission Fluid Pressure Sensor 'B'

Quick Answer

The P0845 diagnostic trouble code (DTC) for Nissan vehicles refers to a malfunction in the transmission fluid pressure sensor 'B'. Common causes include Faulty transmission fluid pressure sensor 'B', Wiring or connector issues in the transmission fluid pressure sensor circuit, Low transmission fluid level or contaminated/dirty transmission fluid. 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
P0845 Nissan indicates Transmission Fluid Pressure Sensor 'B'.
Common causes
Common causes include Faulty transmission fluid pressure sensor 'B', Wiring or connector issues in the transmission fluid pressure sensor circuit, Low transmission fluid level or contaminated/dirty transmission fluid.
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 07, 2024
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Code P0845 Nissan Description

The P0845 diagnostic trouble code (DTC) for Nissan vehicles refers to a malfunction in the transmission fluid pressure sensor 'B'. This sensor is responsible for monitoring the hydraulic pressure within the transmission system. When this sensor fails or malfunctions, it can lead to various issues with the transmission's performance and overall operation of the vehicle.

OBDII Code P0845 Nissan - Transmission Fluid Pressure Sensor 'B'
P0845 Nissan Code - Transmission Fluid Pressure Sensor 'B'

Common Causes of P0845 Nissan

  1. Faulty transmission fluid pressure sensor 'B'
  2. Wiring or connector issues in the transmission fluid pressure sensor circuit
  3. Low transmission fluid level or contaminated/dirty transmission fluid
  4. Malfunctioning transmission control module (TCM)
  5. Internal transmission mechanical issues

Symptoms of P0845 Nissan

  1. Erratic or harsh shifting
  2. Transmission slipping
  3. Delayed gear engagement
  4. Transmission overheating
  5. Illuminated Check Engine light

How to Fix P0845 Nissan

  1. Diagnose the issue by using a scan tool to verify the P0845 code and check for any related codes.
  2. Inspect the wiring and connectors in the transmission fluid pressure sensor circuit for any damage or corrosion.
  3. Test the transmission fluid pressure sensor 'B' using a multimeter to determine if it is faulty.
  4. If the sensor is faulty, replace it with a new sensor and reset the fault codes.
  5. Test drive the vehicle to verify that the issue has been resolved and ensure proper transmission operation.

Cost to Fix P0845 Nissan

The typical repair costs for addressing the P0845 code can vary depending on the specific vehicle make and model, as well as the labor rates in your area. On average, the cost of replacing a transmission fluid pressure sensor 'B' can range from $150 to $300, including parts and labor. It's important to factor in additional costs for diagnostics and any other potential repairs that may be needed. Be sure to consult with your local auto repair shop for a more accurate estimate based on your specific vehicle and location.

What does this mean?

Tech Notes for P0845 Nissan

There is a factory service bulletin for the following Nissan Models:

2007-2008 Nissan Altima
2007-2008 Nissan Rogue
2007-2008 Nissan Sentra
The bulletin suggests replacing the transmission valve body.
2007-2008 Nissan Altima, Rogue, Sentra Factory Service Bulletin OBDII Code P0845

2007 Nissan Maxima
2007 Nissan Maxima Factory Service Bulletin OBDII Code P0845

For Nissan vehicles with CVT transmission, Nissan has extended the CVT warranty from 5 years/60,000 to 10 years/120,000 miles

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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 P0845 Nissan Code

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  • I have seen one used 2008 Nissan Altima which I want to buy. But, the fire stone report said that transmission pressure fluid sensor is not working. Should I buy the car ? or what else I should consider?

    Reply to Comment

  • All depends of the price, but to diagnose/fix the problem, you (or your mechanic) may have to remove the transmission pan and test/replace some of the components. For example if you have to replace the transmission valve body (which is very possible) , the price to replace the valve body is over $1500. My suggestion, don't buy the Sentra.

    Reply to Comment

  • My car is a 2007 nissan sentra and has the code P0845. It has been shifting funny and struggles to acelerate sometimes any ideas on what it could be?

    Reply to Comment

  • Unfortunately, most of the time the problem is the transmission assembly. Sometimes the problem is the Transmission Valve Body, but the cost to replace the Valve Body is as high as to replace the transmission assembly. My suggestion is to have a transmission shop inspect the transmission for you.

    Reply to Comment