Plug an OBD-II scanner into your vehicle's OBD port and reset it to clear the check engine light. Disconnecting and reconnecting your battery will restart your vehicle's computer and clear the light. Drive an older vehicle around for a few days after repairs. The light will go off on its own once the computer resets. P0411 VW/Audi Engine Code: Secondary Air Injection System - Insufficient Flow Detected What symptoms can you look for when you get a P0411 engine code? P0411 VW Symptoms. Check Engine Light (CEL) Illuminating; Secondary air pump making a whishing sound; Engine backfiring; The Audi A4 has been produced across 9 different generations Clear your A4's DTC codes with a scanner. Start the engine and wait for the check engine light to come back on. If it changed to a different P030X code, the plug was bad. If nothing changed, do this for the coil packs and plug wires (if equipped). If the code stays P0304, you've ruled out the most common causes of this code. 2. Diagnosis The engine will struggle to accelerate, and it will consume more fuel. Air leaks also cause an increased load on the turbo, provoking extensive damage. An air leak can easily destroy a turbo. Warning Signs: Symptoms of the P0299 Code. The most obvious symptom of a P0299 code is the check engine light. But that can result in dozens of different 04 audi a4 1.8t ultraspor Location woodlands. My Photo Gallery: 0. Blinking Check Engine Light Guest-only advertisement. Register or Log Someone told me to take the car to a local autozone earlier on this forum so they can see what codes show up for the check engine light, but now the light is blinking and the car sounds bad so I'm not even Turbochargers utilize the exhaust gases that come from the engine and a turbine that forces the air back to the intake. On the other hand, superchargers work from the intake side and are belt-driven, forcing more air into the motor. P0299 Trouble Code Symptoms. When the P0299 trouble code sets, it will cause the Check Engine Light to come on. 1.1M views 2 years ago. In todays video I tackle the easiest check engine code fix I've ever done. This is a very common issue in the B8/8.5 Audis so this could apply to you. Let me Audi Check Engine Light ISSUES and How to Erase It FAST AND EASY.. - YouTube. Common reasons for a Check Engine Light are faulty emissions control part, damaged oxygen sensor, faulty head gasket EPC Light on Audi Vehicles. Like a Check Engine light, an EPC code on a Volkswagen Jetta can be a generic warning or an alert of something more serious. When the drivetrain computer recognizes a reading out of normal spec for a system, it's stored in the computer as a trouble code or EPC code in the case of Volkswagen vehicles. Aside from an illuminated check engine light, here are some other symptoms related to the code: Low engine idle speed; Stalling; Rough Engine Idle; Engine may idle erratically (in some cases) How to Diagnose the P0506 Code. Diagnosing the P0506 code may seem challenging, given that there are several reasons that could trigger this code. N3D1T.