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P0249 OBD2: Turbocharger/Supercharger Wastegate Solenoid "B" Low

P0249 OBD2: Turbocharger/Supercharger Wastegate Solenoid “B” Low

What Does the P0249 Code Mean?

The P0249 code indicates that the Powertrain Control Module (PCM) has detected a low signal from the turbocharger/supercharger wastegate solenoid “B.” This solenoid is responsible for controlling the boost pressure generated by the turbo or supercharger. If the PCM cannot control the solenoid, it will trigger this code.

What Causes the P0249 Code?

  • Powertrain Control Module (PCM) failure
  • Wastegate solenoid failure
  • Wiring issues affecting the solenoid

What Are the Symptoms of the P0249 Code?

  • Lack of boost from the turbo/supercharger

How Serious Is the P0249 Code?

The P0249 code is considered urgent, as it can lead to severe engine damage or performance issues. If left untreated, this malfunction could affect the vehicle’s drivability and potentially harm the driver and passengers.

How to Diagnose the P0249 Code

Diagnosing the P0249 code involves checking the vehicle’s diagnostic system for fault codes, inspecting the wiring and connectors related to the wastegate solenoid, testing the solenoid for proper operation, and verifying the PCM’s functionality.

Common Repairs for the P0249 Code

  • Replacing the wastegate solenoid
  • Repairing or replacing damaged wiring
  • Replacing the Powertrain Control Module (PCM) if necessary

How Much Does It Cost to Fix the P0249 Code?

The cost to fix the P0249 code can vary widely depending on the repairs needed. Replacing a wastegate solenoid may cost between $100 to $300, while PCM replacement can be much more expensive, ranging from $500 to $1,500.

Can I Fix the P0249 Code Myself?

While some DIY enthusiasts may be able to replace the wastegate solenoid or repair wiring issues, diagnosing and replacing a PCM is typically best left to professionals due to the complexity involved. Always ensure you have the necessary tools and knowledge before attempting any repairs.

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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