Audi Diagnostic Trouble Codes
Common OBD2 fault codes found on Audi vehicles with model-specific causes, known issues, TSBs, and adjusted repair cost estimates. Each guide is tailored for Audi owners.
Emissions
"B" Camshaft Position - Timing Over-Retarded (Bank 1)
Audi A4 • 2008-2024
The 2.0 TFSI (EA888) engine uses an exhaust camshaft adjuster that can fail due to oil sludge or a w...
Secondary Air Injection System Malfunction
Audi A4 • 2005-2020
The 2.0 TFSI in the B7 and B8 A4 shares the VW secondary air system. The combination valve is the mo...
Secondary Air Injection System Incorrect Flow Detected
Audi A3 • 2005-2024
The A3 uses the same MQB platform secondary air system as the Golf on 2013+ models. The 2.0 TFSI in ...
Electrical
Engine Overspeed Condition
Audi A3 • 2008-2024
Shares the DSG/S-tronic transmission with the VW Golf. P0219 on automatic A3 models is usually DSG-r...
Intake Manifold Runner Control Circuit/Open (Bank 1)
Audi A4 • 2005-2024
The A4 B7/B8 with the 2.0 TFSI engine has the actuator connector in a particularly tight location th...
Misfire
Ignition
Transmission
Input/Turbine Speed Sensor Circuit Malfunction
Audi A4 • 2005-2024
The A4 with Multitronic CVT (B7/B8) and S-Tronic DSG uses speed sensors that can fail due to metalli...
Torque Converter Clutch Circuit Performance/Stuck Off
Audi A4 • 2005-2024
The B8 and B9 A4 with the ZF 8HP and earlier Aisin transmissions are susceptible to P0741. On the Mu...
Fuel System
Intake Manifold Runner Control Stuck Open (Bank 1)
Audi A4 • 2005-2024
The A4 B7 and B8 with the 2.0 TFSI engine shares the same intake manifold design as the Golf and is ...
Intake Manifold Runner Control Stuck Closed (Bank 1)
Audi A3 • 2004-2024
The A3 shares its engine and intake manifold with the VW Golf. The 2.0 TDI (BKD/BMM engine codes) in...
Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance (Bank 1)
Audi A3 • 2008-2024
The A3 8P and 8V with 2.0 TDI engines share the same intake manifold as the Golf. The A3 2.0 TDI is ...
System Too Lean at Idle (Bank 1)
Audi A3 • 2005-2024
The A3 with 1.4 TFSI and 2.0 TFSI engines shares the same PCV and vacuum leak issues as the VW Golf....
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