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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.
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HOMESERVICE MANUALSVOLKSWAGEN2003PASSAT WAGON (3B6) L4-1.8L TURBO (AWM)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESWITH GENERIC SCAN TOOLDIAGNOSTIC MODE 5: CHECK OUTPUT OF OXYGEN SENSOR SIGNALS
2003 Volkswagen Passat Wagon (3B6) L4-1.8L Turbo (AWM)
Diagnostic Mode 5: Check Output of Oxygen Sensor Signals
2003 Volkswagen Passat Wagon (3B6) L4-1.8L Turbo (AWM)SECTION Diagnostic Mode 5: Check Output of Oxygen Sensor Signals
Diagnostic Mode 5: Check Output Of Oxygen Sensor Signals
NOTE: This diagnostic mode can only be selected with Module Number 10 - Engine Electronics.
Function
The static values of the oxygen sensors are indicated via this diagnostic mode.
The values of the individual oxygen sensor test results must reach the specified value or must be within the min.- and max.- limits.
Requirements
- Exhaust system must be properly sealed between catalytic converter and cylinder head.
- There must not be any DTCs stored in DTC memory. Diagnostic mode 3: Check DTC memory. Diagnostic Mode 3: Check DTC Memory
- Coolant temperature must be at least 80 degrees C. Diagnostic mode 1: Check measured values; PID 5, Coolant temperature. Diagnostic Mode 1: Check Measured Values
Work procedure
- Connect diagnostic tester. Diagnostic Tester, Connecting
- Start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 5: Check output of oxygen sensor signals".
- Select the desired output of oxygen sensor signals "Test-ID XX".
Evaluation of output of oxygen sensor signals:
- Test-ID 01 Bank 1 Sensor 2
- Test-ID 02 Bank 1 Sensor 2
- Test-ID 07 Bank 1 Sensor 2
- Test-ID 08 Bank 1 Sensor 2
- Test-ID 129 Bank 1 Sensor 1
- Test-ID 130 Bank 1 Sensor 1
- Test-ID 131 Bank 1 Sensor 1
- Test-ID 132 Bank 1 Sensor 1
- End diagnosis and switch ignition off.
Evaluation test-ID 01 Bank 1 Sensor 2: Rich to lean sensor barrier voltage
If specified values are not obtained:
- Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
Evaluation test-ID 02 Bank 1 Sensor 2: Lean to rich sensor barrier voltage
If specified values are not obtained:
- Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
Evaluation test-ID 07 Bank 1 Sensor 2: Minimum voltage at sensor for test cycle
If the specified value is not reached:
- Short circuit to Ground (GND) in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensor After Catalyst, Checking
If the specified value is exceeded:
- Oxygen sensor not ready for operation
- Oxygen sensor heater malfunctioning:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC). Oxygen Sensor Before Catalyst, Checking
- Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensor After Catalyst, Checking
Evaluation test-ID 08 Bank 1 Sensor 2: Maximum voltage at sensor for test cycle
If the specified value is not reached:
- Oxygen sensor not ready for operation
- Oxygen sensor heater malfunctioning:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC). Oxygen Sensor After Catalyst, Checking
- Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensor After Catalyst, Checking
If the specified value is exceeded:
- Short circuit to B+ in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensor After Catalyst, Checking
Evaluation test-ID 129 Bank 1 Sensor 1: Actual value of oxygen sensor voltage
If specified values are not obtained:
- Replace Heated Oxygen Sensor (HO2S) -G39-.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
Evaluation test-ID 130 Bank 1 Sensor 1: Control barrier voltage
If specified values are not obtained:
- Replace Heated Oxygen Sensor (HO2S) -G39-.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
Evaluation test-ID 131 Bank 1 Sensor 1: Dynamic value
If specified values are not obtained:
- Replace Heated Oxygen Sensor (HO2S) -G39-.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
Evaluation test-ID 132 Bank 1 Sensor 1: Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) (bank 1 sensor 2)
If specified values are not obtained:
- Replace Heated Oxygen Sensor (HO2S) -G39-.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
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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.