AutoCodes – Generic – P0049

P0049 Code - Turbocharger/Supercharger Turbine Overspeed

Quick Answer

The turbocharger has nozzle vane which opens and closes to control the volume of the exhaust gas flowing into the turbine. Common causes include Faulty boost pressure/ turbocharger position sensor, Boost pressure/ turbocharger position sensor harness is open or shorted, Boost pressure/ turbocharger position sensor 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: P0049 indicates Turbocharger/Supercharger Turbine Overspeed.
Common causes: Common causes include Faulty boost pressure/ turbocharger position sensor, Boost pressure/ turbocharger position sensor harness is open or shorted, Boost pressure/ turbocharger position sensor 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 16,952

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 Apr 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0049 Description

The turbocharger has nozzle vane which opens and closes to control the volume of the exhaust gas flowing into the turbine. This, in turn, controls the boost pressure, when the nozzle vane moves towards the closing direction, the pressure increases. When the vane moves towards the opening direction, the pressure decreases.

OBDII Code P0049 - Turbocharger/Supercharger Turbine Overspeed - AutoCodes.com — P0049 Code - Turbocharger/Supercharger Turbine Overspeed

What does this mean?

What are the Possible Causes of the DTC P0049?

Faulty boost pressure/ turbocharger position sensor
Boost pressure/ turbocharger position sensor harness is open or shorted
Boost pressure/ turbocharger position sensor circuit poor electrical connection
Faulty turbocharger/supercharger

How to Fix the DTC P0049?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0049 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 P0049 code?

Need more information on how to fix the P0049 code? Get Access to Factory Service Manuals

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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 P0049 Code

1. What are the common symptoms of OBDII code P0049 (Turbocharger/Supercharger Turbine Overspeed)?

Symptoms may include reduced engine power, hesitation or surging during acceleration, illuminated Check Engine light, and potential turbocharger or supercharger noise.

2. What are the possible causes of OBDII code P0049?

Causes of this code can include a malfunctioning wastegate, a faulty turbocharger or supercharger bypass valve, wiring issues, or a problem with the turbocharger/supercharger speed sensor.

3. How serious is OBDII code P0049?

This code should be addressed promptly to prevent potential damage to the turbocharger or supercharger system. Continued driving with this issue may lead to engine performance problems or even engine damage.

4. Can I continue driving my vehicle with OBDII code P0049?

It is not recommended to continue driving your vehicle with this code present, as it can result in reduced engine performance and potentially more severe damage to the turbocharger or supercharger components.

5. How can I diagnose OBDII code P0049 at home?

Diagnosing this code typically requires specialized diagnostic equipment to test the turbocharger/supercharger system, inspect wiring connections, and check the operation of related components like the wastegate and speed sensor.

6. What are some repair tips for addressing OBDII code P0049?

Repair tips may include checking and repairing any damaged wiring, testing and replacing faulty components like the wastegate or speed sensor, and ensuring proper operation of the turbocharger or supercharger system.

7. Can a DIY enthusiast fix OBDII code P0049 at home?

While some basic checks and repairs may be possible for experienced DIY enthusiasts, diagnosing and repairing this code often require specialized tools and knowledge of turbocharger/supercharger systems. Professional assistance is recommended.

8. How much does it cost to repair OBDII code P0049?

The cost of repairing this code can vary depending on the underlying cause, the need for replacement parts, and labor costs. It is advisable to obtain quotes from reputable automotive technicians or repair shops.

9. Will resetting the Check Engine light resolve OBDII code P0049?

Simply resetting the Check Engine light will not fix the underlying issue causing OBDII code P0049. The problem should be diagnosed and repaired to prevent further complications.

10. How often does OBDII code P0049 occur in vehicles?

OBDII code P0049 is relatively uncommon compared to other diagnostic trouble codes, but it can still occur in vehicles equipped with turbochargers or superchargers, especially if maintenance is neglected.