Audi A4 Quattro Check Engine Light Due to Vacuum Leaks, Oxygen Sensor, or Catalytic Converter Fault - 125 reports. Learn about this problem, why it occurs, and how to fix it. same engine light and codes read catalytic converter both sides and evap leak . Report. 1998 Audi A4 Quattro 140,000 mi, Visitor. My Audi has all the same problems. 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 A4 (B7 Platform) Discussion - check engine light problem - I have a 2007 B7 A4 w/ CVT. My check engine light came on a few days ago. I took my car to a local mechanic today. They pulled 4 codes. However, they said since they are not VW specialist, they dont have the software and equipment to find out exactly what the The P0171 code indicates that the oxygen (O2) sensor on bank 1 sent a signal to the engine control module that the air-fuel mixture is too lean to be corrected. The O2 sensors have the ability to correct a fuel mixture of +-15%. If it needs to be corrected more than that, the P0171 code will be stored. It ended up saying P0171 System Too Lean (Bank 1). I do not know what that means at all or where to start at all besides knowing it has to do something with fuel and it is not getting enough fuel I would assume. Curious if anyone has any idea what it could be or if there is something common or notorious that it could be. Background information. 1. Have troubles with the Check Engine Light on your Audi dashboard? Learn how to read and clear faulty codes by using an OBD-II scanner . A good Audi All System Scanner will diagnose systems such as Engine, ABS , Airbag, TPMS Transmission, Traction Control, or any other module. prfPU.

audi a4 check engine light codes