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 Volkswagen Passat TDI SELFACTORY OEM SERVICE PROCEDURE
2.0L - Generic Scan Tool - Engine Code: CKRA
- 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
- Test Requirements
- Work Procedure
- 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 $81: Zero Fuel Calibration Monitor
- Monitor-ID $85: Boost Pressure Control Loop
- Monitor-ID $98: 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
- Engine DTC Tables
- Transmission DTC Tables
- Diagnostic Procedures
- Charge Pressure Actuator Position Sensor, Checking
- Charge Air Pressure / Intake Air Temperature Sensor, Checking
- Camshaft Position Sensor, Checking
- Can Bus Terminal Resistance, Checking
- Can Bus Instrument Cluster To Data Bus OBD Interface, Checking
- Ambient Air Temperature Sensor Checking
- Engine Coolant Temperature Sensor, Checking
- Engine Coolant Temperature Sensor On Radiator Outlet, Checking
- Charge Air Coolant Pump, Checking
- Engine Speed Sensor, Checking
- Exhaust Flap Control Module, Checking
- Fuel Injectors, Checking
- Exhaust Pressure Sensor 1 & Differential Pressure Sensor, Checking
- Fuel Pressure Sensor, Checking
- Fuel Transfer Pump And Fuel Pump Relay, Checking
- EGR Temperature Sensor, Checking
- EGR Motor And EGR Potentiometer Sensor, Checking
- EGR Motor 2 And Exhaust Gas RECIRCULATION Position Sensor 2, Checking
- Exhaust Gas Temperature Sensors 1 - 4, Checking
- Fuel Temperature Sensor, Checking
- Cylinder Combustion Chamber Pressure Sensor, Checking
- NOX Sensor / Module, Checking
- Automatic Glow Time Module And Glow Plug, Checking
- Fuel Pressure Regulator Valve, Checking
- Fuel Metering Valve, Checking
- Mass Air Flow Sensor, Checking
- Heated Oxygen Sensor Before Catalytic Converter, Checking
- Accelerator Pedal Position Sensor / Accelerator Pedal Position Sensor 2, Checking
- Throttle Valve Control Module / Throttle Drive Angle, Checking
- WASTEGATE Bypass Regulator Valve, Checking
- Speed Signal, Checking
- Reducing Agent Pump And Heater, Checking
- Reducing Agent Tank Heater, Checking
- Reducing Agent Heated Line Hose, Checking
- Reducing Agent Reservoir Processing Unit With Reservoir Sensor, Checking
- Reducing Agent Injector Checking
- Reduction Agent Tank Temperature Sensor, Checking
- Reducing Agent Metering Pressure Sensor, Checking
- Reducing Agent Reversing Valve 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.