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P0B06 OBD2: AUXILIARY Transmission Fluid Pump Motor Phase W Current

P0B06 OBD2: AUXILIARY Transmission Fluid Pump Motor Phase W Current

What Does the P0B06 Code Mean?

The P0B06 OBD-II code indicates an issue with the AUXILIARY Transmission Fluid Pump Motor Phase W Current. This code is triggered when the Power Inverter Module detects an incorrect amount of current flowing to the auxiliary transmission fluid pump, which is essential for pressurizing the fluid in the transmission and facilitating gear changes.

What Causes the P0B06 Code?

Several factors can lead to the P0B06 code, including:

  • Power inverter module failure
  • Outdated software in the power inverter module

The Power Inverter Module is responsible for controlling the current flow to the auxiliary transmission fluid pump, and any malfunction or software issue can result in this fault code being set.

What Are the Symptoms of the P0B06 Code?

The primary symptom associated with the P0B06 code is that the vehicle will not operate. This can be a significant concern, as it may prevent you from driving your vehicle until the issue is resolved.

How Serious Is the P0B06 Code?

The P0B06 code is classified as urgent. It indicates immediate action is necessary, as failing to address this issue can lead to severe damage to your vehicle’s transmission system or pose risks to driver and passenger safety.

How to Diagnose the P0B06 Code

Proper diagnosis of the P0B06 code involves a thorough inspection of the Power Inverter Module and the auxiliary transmission fluid pump. A mechanic may use an OBD-II scanner to read the code and perform additional tests to determine the exact cause of the current flow issue.

Common Repairs for the P0B06 Code

Common repairs that may be required to resolve the P0B06 code include:

  • Replacing the power inverter module if it has failed
  • Updating the software in the power inverter module to ensure proper function

How Much Does It Cost to Fix the P0B06 Code?

The cost to repair the P0B06 code can vary widely depending on the underlying issue. Replacing a power inverter module can be costly, often ranging from $1,000 to $2,500 depending on the make and model of the vehicle. Software updates may be less expensive but can still incur diagnostic fees.

Can I Fix the P0B06 Code Myself?

While some vehicle owners may be tempted to attempt repairs themselves, diagnosing and fixing the P0B06 code typically requires professional expertise. It is essential to understand the complexities involved with the Power Inverter Module and the auxiliary transmission fluid pump. Proper diagnosis will save you time and money on unnecessary repairs.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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