![]() ![]() ![]() The presence of the P0299 code can point to some rather serious mechanical failures, especially if left unaddressed. Following the diagnostic steps properly and in the right order is important for accurate diagnosis. P0299 can have a wide variety of symptoms and causes. Mistakes can be made if all steps are not followed in the proper order are are not completed at all. Next, a visual inspection will be performed of the turbo / supercharger system, intake system, EGR system, and any other associated systems.Īfter, the scan tools will used to check for proper boost pressure readings.Īll mechanical systems will be inspected such as the turbo or supercharger itself, oil pressure and the intake system for leaks or restrictions.Ĭommon mistakes when diagnosing the P0299 code ![]() The codes will then be cleared and a test drive performed. The technician will note all freeze frame data, which will have information about what conditions the vehicle was under when the code was set. How does a mechanic diagnose the P0299 code?Ī mechanic will begin by hooking up a scan tool into the vehicle's OBD-II port and checking for any codes present. Mechanical noise (failing turbo / supercharger).The limp mode is to prevent further damage to the vehicle and will remain until the code is cleared or repaired. This code will illuminate a Check Engine Light on the dashboard and may put the vehicle in limp mode. The ECU looks for a specific range of boost and when the low boost is detected by the ECU, it sets a P0299 code. The P0299 code indicates that the Turbo or Supercharger "A" has excessively low output. P0299 is a generic OBD-II diagnostic trouble code indicating an underboost condition. ![]()
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