Audi Q3 White Exhaust Smoke: Causes, Diagnosis, How to Fix

If you own a Audi Q3, you may have noticed white exhaust smoke coming from your vehicle on occasion. This can be concerning, and it’s essential to understand the possible causes behind this phenomenon to address the issue promptly and efficiently. Several factors can contribute to white smoke emanating from your vehicle’s exhaust pipe, and … Read more

Audi Q3 P0406:  EGR Sensor “A” → Circuit High

  P0406 is a generic OBDII Diagnostic code.  It deals with the signal coming from the EGR system.  In this case, it means that the signal coming from the EGR system is higher than the specified range  Since it is a generic code, it has the same meaning for the Audi Q3 as it would … Read more

Audi Q3 Troubleshooting:  Squeaky Brakes

  Your Audi Q3‘s braking system is designed to handle thousands of miles of braking with no intervention from you.  When its brakes begin to squeak, they are telling you that they need some attention. The most typical cause of squeaky brakes are the brake pads themselves, but there are other issues that can cause … Read more

Audi Q3 P0405:  EGR Sensor “A” → Circuit Low

  P0405 is a generic OBDII trouble code.  It deals with the signal coming from the EGR system.  Since it is a generic code, it has the same meaning for the Audi Q3 as it would any other vehicle.   The EGR system allows a certain amount of the Q3’s exhaust to re-enter the combustion chamber, … Read more

Audi Q3 P0421 Code: Meaning, Causes, How to Fix

P0421 is a relatively rare OBDII trouble code.   It’s generic, which means it has the same definition for the Audi Q3 as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Audi Q3’s catalytic converter is not scrubbing pollutants efficiently … Read more

Audi Q3 P0740: Torque Converter Clutch Circuit Malfunction

P0740 is one of the most common transmission trouble codes. It means that the Q3‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit.     P0740: Torque Converter Clutch Circuit Malfunction   The TCC “locks” the drivetrain, which allows for a true mechanical connection between the transmission … Read more

Audi Q3 P0160: O2 Sensor → No Activity Detected B2S2

  P0160 is a standard OBDII trouble code. It has the same meaning for any vehicle with OBDII, including the Audi Q3. When a vehicle has P0160, the PCM/ECM is not detecting any activity from the sensor.  It doesn’t mean that the O2 sensor isn’t getting power, but that the voltage isn’t changing, which is … Read more