Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Audi A3 2.0 TDIFACTORY OEM SERVICE PROCEDURE
2.0L - Generic Scan Tool - Engine Code(S): CBEA
- St Generic Scan Tool
- General Information
- Description And Operation
- Diagnosis And Testing
- Preliminary Check
- Readiness Code
- Diagnostic Modes 01 - 09
- Notes
- Diagnostic Mode 01 - Read Current System Data
- Diagnostic Mode 02 - Read Operating Conditions
- Diagnostic Mode 03 - Read DTC Memory
- Diagnostic Mode 04 - Erase DTC Memory
- Diagnostic Mode 06 - Read Test Results For Specific Diagnostic Functions
- Notes
- Monitor-ID $01: Oxygen Sensor Monitor Bank 1 - Sensor 1
- Monitor-ID $02: Oxygen Sensor Monitor Bank 1- Sensor 2
- Monitor-ID $21: Catalytic Converter Monitoring
- Monitor-ID $31: EGR Control Loop
- Monitor-ID $90: NOx Absorber
- Monitor-ID $A2: Mis-Fire Cylinder 1 Data
- Monitor-ID $A3: Mis-Fire Cylinder 2 Data
- Monitor-ID $A4: Mis-Fire Cylinder 3 Data
- Monitor-ID $A5: Mis-Fire Cylinder 4 Data
- Monitor-ID $B2: Particulate Matter Trap Efficiency
- Diagnostic Mode 07 - Read Faults Detected During The Current Or Last Driving Cycle
- Diagnostic Mode 08 - Request Control Of On-Board System, Test Or Component
- Diagnostic Mode 09 - Read Vehicle Information
- Diagnostic Mode 0A - Check Permanent DTC Memory
- DTC Tables
- Diagnostic Procedures
- Charge Pressure Actuator Position Sensor
- Charge Air Pressure Sensor, Checking
- Camshaft Position Sensor, Checking
- Can Bus Terminal Resistance, Checking
- Can Bus Instrument Cluster To Data Bus OBD Interface, Checking
- Catalytic Converter, Checking
- Engine Coolant Temperature Sensor, Checking
- Engine Coolant Temperature Sensor 2, Checking
- Engine Speed Sensor, Checking
- Exhaust Flap Control Module, Checking
- Fuel Injectors, Checking
- Exhaust Pressure Sensor 1 Or 2, Checking
- Fuel Pressure Sensor, Checking
- Transfer Fuel Pump, Checking
- Auxiliary Fuel Pump Checking
- Auxiliary Fuel Pump Relay
- EGR Temperature Sensor, Checking
- Exhaust Gas RECIRCULATION Motor And EGR Potentiometer, Checking
- Exhaust Gas RECIRCULATION Motor 2 And EGR Potentiometer 2, Checking
- Exhaust Gas Temperature Sensors 1 - 4, Checking
- Fuel Temperature Sensor, Checking
- Cylinder Pressure Sensor Checking
- Automatic Glow Time Module And Glow Plug Checking
- Intake Air Temperature Sensor, Checking
- Intake Manifold Flap Motor And Runner Position Sensor, Checking
- Fuel Pressure Regulator Valve Checking
- Fuel Metering Valve, Checking
- Mass Air Flow Sensor, Checking
- Oxygen Sensor Before Catalytic Converter, Checking
- Oxygen Sensor Behind Catalytic Converter, Checking
- Positive Crankcase Ventilation (PCV) Heating Element, Checking
- Throttle Position Sensor/Accelerator Pedal Position Sensor 2, Checking
- Throttle Valve Control Module, Checking
- WASTEGATE Bypass Regulator Valve, Checking
- Speed Signal, Checking
- Voltage Supply, Checking
- Power Supply Relay, Checking
- Power Supply Relay 2, Checking
- Power Supply Relay (Terminal 50), Checking
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.