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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 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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