Date Model Control unit address (e.g. 01) Diagnostic procedure
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - injector 1-4 (N30;N31;N32;N33)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - system indicator light: glowing (K29)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - Starter control (J906)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - high heat performance relay (J360)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - low heat performance relay (J359)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - throttle valve: control unit (J338)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of radiator fan control unit (J293)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of heating (glow) unit (J179)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of DPF differential pressure sensor 1 (G505)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of engine temperature sensor - outlet from radiator (G83)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of fuel temperature sensor (G81)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of engine temperature sensor (G62)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of intake air temperature sensor (G42)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - exhaust gas return valve 1 (GX5)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - Change-over valve for the cooler of the exhaust gas recirculation
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test - exhaust recirculation - servo motor (V338)
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Evacuation of fuel tank
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test / activation of fuel pump and control relay
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Bleeding of fuel system
21.1.2025 A4 (8K) B8 (MLB/PQ48) 2008 - 2016 01 - Engine Test of pedal switches (cruise control)