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AutoCodes – Generic – P0845

P0845 Code - Transmission Fluid Pressure Sensor/Switch 'B' Circuit

Quick Answer

DTC P0845 will set if an error occurs in 2-4 pressure switch. Common causes include Faulty Transmission Fluid Pressure Sensor 'B', Transmission Fluid Pressure Sensor 'B' harness is open or shorted, Transmission Fluid Pressure Sensor 'B' poor electrical connection. 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 indicates Transmission Fluid Pressure Sensor/Switch 'B' Circuit.
Common causes
Common causes include Faulty Transmission Fluid Pressure Sensor 'B', Transmission Fluid Pressure Sensor 'B' harness is open or shorted, Transmission Fluid Pressure Sensor 'B' poor electrical connection.
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 45,288
How popular is this code, among other codes? Medium
What is this?
Table of contents Created and updated by William Orellana on May 10, 2019
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Code P0845 Description

DTC P0845 will set if an error occurs in 2-4 pressure switch. TCM momentarily turns on element pressure to 2-4 clutch circuit to identify that pressure switch closes. If switch does not close after first test, switch is tested again. If switch does not close on second test, DTC will set. MIL illuminates and transmission system defaults to limp-in mode.
OBDII Code P0845 - Transmission Fluid Pressure Sensor/Switch 'B' Circuit - AutoCodes.com
P0845 Code - Transmission Fluid Pressure Sensor/Switch 'B' Circuit
What does this mean?

What are the Possible Causes of the DTC P0845?

  • Faulty Transmission Fluid Pressure Sensor 'B'
  • Transmission Fluid Pressure Sensor 'B' harness is open or shorted
  • Transmission Fluid Pressure Sensor 'B' poor electrical connection
  • Transmission Valve Body

How to Fix the DTC P0845?

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 P0845 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 P0845 code?

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Need Help with the Code?

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Information for Specific Makes

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 Code

No Frequently Asked Questions about P0845 Code found.

Discuss the causes and fixes for P0845 OBDII Code

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  • quisiera saber si el codigo p0845 que significa en un nissan al tima 2007

    Reply to Comment

  • Es possible que su Altima necesite el valve body de la transmicion. Hay un boletin de Nissan para ese problema. Ademas, Nissan extendio la garantia de las transmiciones hasta las 120,000 millas. Puede encontras mas informacion aqui: https://www.autocodes.com/cod...

    Reply to Comment
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