AutoCodes – Honda – P0299 Honda

P0299 Honda Code - Turbocharger Underboost Problem

Quick Answer

The Powertrain Control Module (PCM) controls the turbocharger control system to control boost pressure. Common causes include Turbocharger Wastegate Control Valve Stuck Open, Turbocharger Bypass Control Valve Open/Close, Turbine damage or seizure. 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 Honda indicates Turbocharger Underboost Problem.
Common causes
Common causes include Turbocharger Wastegate Control Valve Stuck Open, Turbocharger Bypass Control Valve Open/Close, Turbine damage or seizure.
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 2,221
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 07, 2023
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Code P0299 Honda Description

The Powertrain Control Module (PCM) controls the turbocharger control system to control boost pressure. When the difference between the target boost pressure and actual boost pressure is at a specified value for a predetermined time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).
OBDII Code P0299 Honda - Turbocharger Underboost Problem - AutoCodes.com
P0299 Honda Code - Turbocharger Underboost Problem

What are the Possible Causes of the DTC P0299 Honda?

  • Turbocharger Wastegate Control Valve Stuck Open
  • Turbocharger Bypass Control Valve Open/Close
  • Turbine damage or seizure
  • Exhaust pipe clogged
  • Air cleaner element clogged
  • Air tube between compressor and intercooler damage/leakage
  • Turbocharger boost sensor range/performance problem
  • BARO Sensor range/performance problem

How to Fix the DTC P0299 Honda?

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 Honda 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 Honda code?

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Need Help with the Code?

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Information for Specific Honda Models

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 Honda Code

1. What are the common symptoms of OBDII code P0299 in a Honda indicating a turbocharger underboost problem?

- Common symptoms include loss of power, reduced acceleration, engine hesitation, and potentially increased fuel consumption.

2. What are the possible causes of OBDII code P0299 in a Honda related to turbocharger underboost?

- Causes can include a faulty wastegate, boost pressure sensor issues, leaks in the intake system, damaged turbocharger, or a malfunctioning turbocharger actuator.

3. How can I diagnose the turbocharger underboost problem causing OBDII code P0299 in my Honda?

- Diagnosis involves checking for leaks in the intake system, inspecting the wastegate and actuator, testing the boost pressure sensor, and ensuring the turbocharger is functioning properly.

4. Can a clogged air filter lead to OBDII code P0299 in a Honda due to turbocharger underboost?

- Yes, a clogged air filter can restrict airflow to the turbocharger, leading to underboost conditions and triggering OBDII code P0299.

5. Is it safe to continue driving my Honda with OBDII code P0299 indicating a turbocharger underboost problem?

- It is not recommended to drive your vehicle with this issue as it can cause further damage to the turbocharger and other engine components.

6. How can I repair OBDII code P0299 in my Honda caused by a turbocharger underboost problem?

- Repair options may involve fixing leaks in the intake system, replacing the boost pressure sensor, repairing or replacing the turbocharger, or addressing issues with the wastegate or actuator.

7. Can a software update fix OBDII code P0299 in my Honda related to turbocharger underboost?

- In some cases, a software update provided by the manufacturer may help resolve issues causing the turbocharger underboost problem and clear the OBDII code.

8. Are there any preventative maintenance tips to avoid OBDII code P0299 in a Honda due to turbocharger underboost?

- Regularly inspecting and maintaining the turbocharger system, replacing air filters as recommended, and using high-quality engine oil can help prevent issues leading to underboost conditions.

9. Can extreme weather conditions contribute to triggering OBDII code P0299 in a Honda indicating a turbocharger underboost problem?

- Yes, extreme temperatures can affect the performance of the turbocharger system, potentially leading to underboost conditions and triggering the OBDII code P0299.

10. How important is it to address OBDII code P0299 in a Honda indicating a turbocharger underboost problem promptly?

- It is crucial to address this issue promptly to prevent further damage to the turbocharger and ensure the optimal performance and efficiency of your vehicle.

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