AutoCodes – Volkswagen – P0299 Volkswagen

P0299 Volkswagen Code - Turbocharger Engine Underboost

Quick Answer

The Manifold Absolute Pressure (MAP) sensor measures the pressure inside the intake manifold. Common causes include Faulty Wastegate Bypass Regulator Valve, Mechanical damage at Turbo/Super Charger, Faulty Charge Air Pressure Sensor. 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
P0299 Volkswagen indicates Turbocharger Engine Underboost.
Common causes
Common causes include Faulty Wastegate Bypass Regulator Valve, Mechanical damage at Turbo/Super Charger, Faulty Charge Air Pressure Sensor.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 86,096
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on May 12, 2019
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P0299 Volkswagen Description

The Manifold Absolute Pressure (MAP) sensor measures the pressure inside the intake manifold. The pressure in the intake manifold is affected by turbocharging output, engine speed, accelerator pedal input, ambient air temperature, and Barometric Pressure (BARO). A diaphragm within the MAP pressure sensor is displaced by the pressure changes that occur from the varying load and operating conditions of the engine. Under normal operation, then the lowest pressure that can exist in the intake manifold is equal to the BARO. This occurs when the vehicle is operated at idle or when the ignition is ON while the engine is OFF. The highest manifold pressure occurs when the turbocharger output is high. The manifold pressure range from 58 kPa (8 psi) when pressure are low to more than 296 kPa(42.7 psi) when pressures are high, depending on the BARO.
OBDII Code P0299 Volkswagen - Turbocharger Engine Underboost - AutoCodes.com
P0299 Volkswagen Code - Turbocharger Engine Underboost

What are the Possible Causes of the DTC P0299 Volkswagen?

  • Faulty Wastegate Bypass Regulator Valve
  • Mechanical damage at Turbo/Super Charger
  • Faulty Charge Air Pressure Sensor

How to Fix the DTC P0299 Volkswagen?

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 P0299 Volkswagen 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 P0299 Volkswagen code?

Need more information on how to fix the P0299 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0299 Volkswagen code diagnosed by a professional: Find a repair shop in your area

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 P0299 Volkswagen Code

1. What are common symptoms of OBDII code P0299 in a Volkswagen related to turbocharger engine underboost?

Common symptoms include reduced engine power, slow acceleration, engine hesitation, and potentially an illuminated check engine light.

2. What are some possible causes of the P0299 OBDII code in a Volkswagen?

Causes may include a faulty wastegate, boost leak in the intake system, damaged turbocharger, malfunctioning boost pressure sensor, or a clogged air filter.

3. How can I diagnose the cause of the P0299 code in my Volkswagen?

Diagnosis typically involves inspecting the turbocharger system for leaks, checking the wastegate operation, testing the boost pressure sensor, scanning for any other related trouble codes, and ensuring proper air intake.

4. Can a clogged air filter trigger the P0299 code in a Volkswagen?

Yes, a clogged air filter can restrict airflow to the engine, leading to insufficient boost pressure and triggering the P0299 code related to turbocharger underboost.

5. What repair tips can help resolve the P0299 code in a Volkswagen?

Repair tips may include replacing a faulty wastegate actuator, fixing any boost leaks, cleaning or replacing the air filter, inspecting the turbocharger for damage, and ensuring all connections in the turbo system are secure.

6. Is it safe to continue driving my Volkswagen with the P0299 OBDII code present?

It is not recommended to continue driving with the P0299 code, as it can lead to long-term engine damage and reduced performance. It's best to address the underlying issue promptly.

7. Can a simple reset of the OBDII system clear the P0299 code in a Volkswagen?

Resetting the system may temporarily clear the code, but if the underlying issue causing the turbocharger underboost is not addressed, the code is likely to return after driving the vehicle again.

8. How much does it typically cost to repair the P0299 code in a Volkswagen at a mechanic or dealership?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any preventive maintenance steps I can take to avoid the P0299 code in my Volkswagen?

Regularly inspecting and maintaining the turbocharger system, replacing air filters as recommended, using quality fuel, and addressing any performance issues promptly can help prevent the occurrence of the P0299 code.

10. Can a DIY enthusiast with some automotive experience fix the P0299 code in a Volkswagen?

Depending on the root cause of the issue, some DIY enthusiasts may be able to address the P0299 code themselves, such as by replacing air filters or checking for boost leaks. However, more complex issues may require professional diagnosis and repair.

Discuss the causes and fixes for P0299 Volkswagen OBDII Code

  • good day
    I have a vw crafter 2.5 bjk
    when I drive and reech about 80 - 100 km/h then the turbo cuts off and there is not so much power
    when I switch it off and on again I can drive till it happens again
    please if you can help

  • Hi,
    Did you solve the problem?
    I have the same problem

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play