AutoCodes – Chevrolet – P0299 2018 Chevrolet Silverado

P0299 2018 Chevrolet Silverado Code - Engine Underboost

Quick Answer

The Engine Control Module (ECM) uses the Manifold Absolute Pressure (MAP) sensor input and turbocharger actuator output to control the amount of engine induction system boost pressure. Common causes include Faulty Turbocharger Vane Position Actuator, Air leaks between the turbocharger and the intake air flow valve, Airflow restrictions in air ducts or air filter. 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 2018 Chevrolet Silverado indicates Engine Underboost.
Common causes: Common causes include Faulty Turbocharger Vane Position Actuator, Air leaks between the turbocharger and the intake air flow valve, Airflow restrictions in air ducts or air filter.
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 488

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 09, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0299 2018 Chevrolet Silverado Description

The Engine Control Module (ECM) uses the Manifold Absolute Pressure (MAP) sensor input and turbocharger actuator output to control the amount of engine induction system boost pressure. The ECM calculates a desired boost pressure value and monitors the actual boost pressure. If the difference between the actual boost pressure and the desired boost pressure is less than or greater than a calibrated threshold level, the ECM detects that the amount of detected boost pressure is out of range. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the difference between the actual boost pressure and the desired boost pressure in the intake manifold is less than the expected range for 12.5 s. The 12.5 s time is not continuous but cumulative. The timer may sum up a heavy load condition obtained during different maneuvers.

OBDII Code P0299 2018 Chevrolet Silverado - Engine Underboost - AutoCodes.com — P0299 2018 Chevrolet Silverado Code - Engine Underboost

What does this mean?

What are the Possible Causes of the DTC P0299 2018 Chevrolet Silverado?

Faulty Turbocharger Vane Position Actuator
Air leaks between the turbocharger and the intake air flow valve
Airflow restrictions in air ducts or air filter
Ice or debris in the induction system
Leaks at the Positive Crankcase Ventilation (PCV) system
Faulty Turbocharger

How to Fix the DTC P0299 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P0299 2018 Chevrolet Silverado 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 P0299 2018 Chevrolet Silverado Code

1. What does OBDII code P0299 mean for my 2018 Chevrolet Silverado?

Code P0299 indicates that there is a problem with the turbo or supercharger in your vehicle, leading to engine underboost.

2. What are some common symptoms of OBDII code P0299 in a 2018 Chevrolet Silverado?

Common symptoms include reduced engine power, lack of acceleration, and potential engine stalling.

3. What are the possible causes of OBDII code P0299 in a 2018 Chevrolet Silverado?

Causes of P0299 can include issues with the turbocharger/supercharger, wastegate problems, boost leaks, faulty sensors, or a clogged air filter.

4. How can I diagnose the OBDII code P0299 in my 2018 Chevrolet Silverado?

Diagnosis typically involves checking for boost leaks, inspecting the turbo/supercharger components, testing sensors, and scanning for related trouble codes.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P0299?

It is not recommended to drive the vehicle with P0299, as continued driving can potentially cause further damage to the engine components.

6. How can I repair OBDII code P0299 in my 2018 Chevrolet Silverado?

Repairing P0299 may involve fixing boost leaks, replacing faulty sensors, cleaning or replacing air filters, inspecting the wastegate, or repairing/replacing the turbocharger/supercharger.

7. Is it possible to reset the OBDII code P0299 in a 2018 Chevrolet Silverado without fixing the underlying issue?

While clearing the code may temporarily turn off the check engine light, it is crucial to address the root cause of P0299 to prevent further damage and ensure proper vehicle performance.

8. Are there any maintenance tips to prevent OBDII code P0299 in a 2018 Chevrolet Silverado?

Regularly servicing the turbo/supercharger system, replacing air filters as recommended, and addressing any unusual engine symptoms promptly can help prevent P0299 issues.

9. Can extreme weather conditions contribute to triggering OBDII code P0299 in a 2018 Chevrolet Silverado?

Yes, extreme temperatures can impact turbocharger performance, potentially leading to underboost conditions and triggering code P0299.

10. Should I seek professional help to diagnose and repair OBDII code P0299 in my 2018 Chevrolet Silverado?

Yes, due to the complexity of turbocharger systems and potential causes of P0299, it is advisable to consult a certified mechanic for accurate diagnosis and proper repairs.