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P06B5 OBD2: Sensor Power Supply "B" Circuit High

P06B5 OBD2: Sensor Power Supply “B” Circuit High

OBD-II code P06B5 indicates a problem with the power supply to the sensors in your vehicle. Specifically, it signifies that the Powertrain Control Module (PCM) has detected a high voltage in the Sensor Power Supply “B” circuit.

What Does the P06B5 Code Mean?

The P06B5 code is related to the vehicle’s PCM, which is responsible for supplying power to various sensors. When the PCM detects an issue with the power supply to these sensors, it triggers this fault code.

What Causes the P06B5 Code?

Several factors can lead to the P06B5 code, including:

  • Powertrain Control Module (PCM) failure
  • Wiring issues related to the sensor power circuit

What Are the Symptoms of the P06B5 Code?

Symptoms of the P06B5 code can vary, but common signs include:

  • Check Engine Light illuminated
  • Electrical issues with sensors
  • Poor engine performance

How Serious Is the P06B5 Code?

The severity of the P06B5 code is considered moderate. While it may not pose an immediate threat to the vehicle’s safety or functionality, it is advisable to have it diagnosed and repaired within a reasonable time frame to avoid potential complications.

How to Diagnose the P06B5 Code

Diagnosing the P06B5 code typically involves the following steps:

  1. Use an OBD-II scanner to confirm the P06B5 code.
  2. Inspect the wiring and connectors related to the sensor power supply.
  3. Test the PCM to determine if it is functioning correctly.
  4. Check for any related codes that may provide additional context.

Common Repairs for the P06B5 Code

Common repairs for the P06B5 code may include:

  • Replacing the Powertrain Control Module (PCM)
  • Repairing or replacing damaged wiring or connectors

How Much Does It Cost to Fix the P06B5 Code?

The cost to fix the P06B5 code can vary widely depending on the underlying issue. Repairs can range from as low as $100 for wiring repairs to over $1,000 for PCM replacement. Always get a detailed estimate from a trusted mechanic.

Can I Fix the P06B5 Code Myself?

While some DIY enthusiasts may be able to address wiring issues or replace the PCM, diagnosing and fixing the P06B5 code often requires specialized knowledge and tools. If you are not experienced with automotive electronics, it is advisable to seek help from a certified mechanic.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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