FIXD Research Team January 24, 2023 TABLE OF CONTENTS Diagnose and clear your check engine light! GET FIXD 67% OFF We've scanned over 398956 Audi A4s with the FIXD OBD2 scanner and app. These are the 5 most common reasons for a check engine light in your Audi A4. Diagnose Your A4 Check Engine Light in Seconds The video above shows how to locate the on board diagnostics OBD plug location on your 2010 A4, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your A4. Is it OK to drive with a check engine light on? An issue with the oxygen sensor: The oxygen sensor is responsible for monitoring the air/fuel mixture in the engine. If there's a problem with the sensor, it can cause the mixture to be off, which will trigger the check engine light. A faulty ignition coil: The ignition coil helps to create sparks that ignite the air/fuel mixture in the There should be a check engine light code associated with the limp mode condition. Do you know what that code is? There may even be more than one. Hi, I have a 2006 Audi A4 Tdi 2l automatic. It recently activated the limp mode, NO warning lights on dash. Checked all fluids, tip top. It hasn't activated again, but still worried why it did Generic Diagnostic Trouble Code (DTC) P0299 indicates an underboost condition regarding your car. Join us as we define the code, discuss its severity, and provide solutions. An active check engine light is a common symptom of the P000D trouble code. How to Diagnose the P000D Code. Diagnosing the P000d trouble code may prove challenging if you are not knowledgeable about VVT systems and auto repair. In many cases, it's best to leave the job to a mechanic for an accurate diagnosis. You can check codes and reset the check engine light with such a tool. For a maintenance light: Check your owners manual if you have it. There is most likely a simple "end user" procedure for resetting the light. If you don't have the owner's manual, try googling for "audi a4 service light reset". D. djskeet · #15 · Oct 12, 2010. i just got my 03' a4 3.0 6-speed stick about 3 weeks ago and now i have the same exact problem. EPC and check engine light comes on, revs are limited to 4,000 and car idles at 1,100/200 rpms. my car also randomly jumps on its own or stops for a second like if i tapped the break when im cruising at 2,500 rpms If the 'Check Engine' light suddenly comes on in your Audi, it may be time to bring your vehicle in for service. Service Safety Luxury e-tron Technology 2017 Audi A4 Audi Q8 Concept Hybrid Audi 2017 Audi Q7 maintenance Performance audi Electric Why You Should Get Your Car Detailed mmi BMW Active Hybrid e-Bike Car-Buying Tips Urban Lifestyle The check engine light — more formally known as the malfunction indicator lamp (MIL) — is a signal from the car's engine computer that something is wrong. The light could be a minor issue 4zr4.