Modern vehicles use knock sensors to detect engine detonation. This allows the PCM (powertrain control module) to run very aggressive spark timing. If you are concerned that your Audi A5 has a bad knock sensor, we’ve listed them out below. A knock sensor works by listening to your engine and determining if your A5 is … Read more
No matter where you live if your Audi A5’s AC compressor is not turning on, it can turn a pleasant commute into a nightmare (particularly if you have kids that are riding with you). The AC compressor pulley is always being turned by either the serpentine belt or a dedicated belt (it’s going to depend … Read more
U0101 is a generic powertrain code, which means it has the same definition for the Audi A5 as it would any other vehicle. It means that your A5’s TCM (Transmission Control Module) can’t communicate with the rest of the vehicle, usually due to a bad wiring harness or an issue with the TCM itself. U0101 … Read more
P219B is a generic OBD2 trouble code. This code indicates that your Audi A5’s air/fuel ratio is out of balance (too rich or too lean) on the bank 2 side of the engine in question. Your A5 is equipped with oxygen sensors that measure the air-fuel ratio of your engine. It’s these sensors that are … Read more
P219A is a generic OBDII code. The code indicates that your Audi A5’s air/fuel ratio is out of balance (too rich or too lean). Your A5 is equipped with oxygen sensors that measure the air-fuel ratio of your engine. It’s these sensors that are reporting the problem with the air-fuel ratio. With P219A are … Read more
U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Audi A5). This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. When a vehicle has … Read more
P2099 is a generic OBD II code. It has the same meaning for the Audi A5 as it would any other vehicle. It specifically indicates that your A5 detected that air-fuel mixture reading as the exhaust gas exits the catalytic converter on the bank 2 side of the engine is too rich. (too much fuel … Read more
P2097 is a generic OBD II code, which means that it has the same meaning for the Audi A5 as it would any other vehicle. It specifically indicates that your A5 detected that air-fuel mixture reading as the exhaust gas exits the catalytic converter is too rich. (too much fuel for the amount of fuel … Read more
P2098 is a generic OBD II code. It specifically indicates that your A5 detected a lean condition after the catalytic converter (too much air for the amount of fuel present). P2098 Definition This particular code is generic, so it has the same meaning for your Audi A5 as any other vehicle. There are three parts … Read more
U0073 Definition: Control Module Communication Bus”A” Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Audi A5 as it would any other. This code appears when something has interrupted the communication between two of your A5’s control modules. The most common causes of U0073 are … Read more