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P0299 is a diagnostic trouble code (DTC) for "Turbo / Supercharger Underboost Condition". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
P0299 is a generic OBD-II diagnostic trouble code indicating an underboost condition.
The P0299 code indicates that the Turbo or Supercharger "A" has excessively low output. The ECU looks for a specific range of boost and when the low boost is detected by the ECU, it sets a P0299 code.
This code will illuminate a Check Engine Light on the dashboard and may put the vehicle in limp mode. The limp mode is to prevent further damage to the vehicle and will remain until the code is cleared or repaired.
A mechanic will begin by hooking up a scan tool into the vehicle's OBD-II port and checking for any codes present.
The technician will note all freeze frame data, which will have information about what conditions the vehicle was under when the code was set.
The codes will then be cleared and a test drive performed.
Next, a visual inspection will be performed of the turbo / supercharger system, intake system, EGR system, and any other associated systems.
After, the scan tools will used to check for proper boost pressure readings.
All mechanical systems will be inspected such as the turbo or supercharger itself, oil pressure and the intake system for leaks or restrictions.
Mistakes can be made if all steps are not followed in the proper order are are not completed at all. P0299 can have a wide variety of symptoms and causes. Following the diagnostic steps properly and in the right order is important for accurate diagnosis.
The presence of the P0299 code can point to some rather serious mechanical failures, especially if left unaddressed. If any mechanical noise or drivability concerns are present, then the vehicle should be repaired as soon as possible. If a turbo charger unit fails and the vehicle is driven it can result in costly engine damage.
When a turbocharger fails it can cause a piece of the turbine to become sucked into the engine. If a sudden loss of power is observed along with a mechanical noise stop the vehicle in a safe location immediately.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.