AutoCodes – Subaru – P0B0B Subaru

P0B0B Subaru Code - Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the Auxiliary Transmission Fluid Pump Motor. Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid Pump circuit 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: P0B0B Subaru indicates Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit High.
Common causes: Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid Pump circuit 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 6,990

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0B0B Subaru Description

The Engine Control Module (ECM) monitors the Auxiliary Transmission Fluid Pump Motor. The ECM sets the OBDII code when the Auxiliary Transmission Fluid Pump Motor signal is out of factory specifications.

OBDII Code P0B0B Subaru - Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit High - AutoCodes.com — P0B0B Subaru Code - Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit High

What does this mean?

What are the Possible Causes of the DTC P0B0B Subaru?

Faulty Auxiliary Transmission Fluid Pump
Auxiliary Transmission Fluid Pump harness is open or shorted
Auxiliary Transmission Fluid Pump circuit poor electrical connection

How to Fix the DTC P0B0B Subaru?

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 does this mean?

Code Tech Notes

There is a factory service bulletin for the P0B0B code. The factory recommends replacing A leaking o-ring which seals the electric oil pump relief valve may allow CVT fluid to enter the pump's electric motor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0B0B Subaru 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 P0B0B Subaru 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 P0B0B Subaru Code

1. What are the common symptoms of OBDII code P0B0B in a Subaru related to the Auxiliary Transmission Fluid Pump Motor Supply Voltage Circuit High?

- Common symptoms include the illumination of the Check Engine Light, transmission shifting issues, and potential loss of power.

2. What are some possible causes of the OBDII code P0B0B in a Subaru?

- Possible causes may include a faulty auxiliary transmission fluid pump motor, issues with the wiring or connectors, or a malfunctioning control module.

3. How can I diagnose the OBDII code P0B0B affecting the Auxiliary Transmission Fluid Pump in my Subaru?

- Diagnosis involves using an OBDII scanner to retrieve the specific fault code, conducting a visual inspection of wiring and connectors, and testing the auxiliary transmission pump motor for proper function.

4. What are the recommended repair tips for resolving the OBDII code P0B0B in a Subaru?

- Repair tips may include repairing or replacing damaged wiring and connectors, testing and replacing the auxiliary transmission pump motor if necessary, and resetting the fault code using the OBDII scanner.

5. Can driving with the OBDII code P0B0B present in a Subaru cause further damage?

- Continuing to drive with this fault code present can potentially cause damage to the transmission system and may lead to more severe issues over time. It is recommended to address the problem promptly.

6. Is it safe to continue driving my Subaru if the Check Engine Light is on due to the OBDII code P0B0B?

- It is best to avoid driving the vehicle if possible when the Check Engine Light is on as a result of this fault code. Continued driving may exacerbate the issue and result in more costly repairs.

7. How much does it typically cost to repair the OBDII code P0B0B in a Subaru at a professional mechanic or dealership?

- The cost of repairing this fault code can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any preventative maintenance steps I can take to avoid encountering the OBDII code P0B0B in my Subaru in the future?

- Regularly inspecting and maintaining the transmission system, including the auxiliary pump, checking for any signs of wear or damage, and addressing any issues promptly can help prevent this fault code from occurring.