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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 MANUALSVOLKSWAGEN2002GOLF GLS, 2.0 K, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 91 (2.8L & 3.2L - GENERIC SCAN TOOL, ENGINE CODE(S): AFP, BDF, BJS [A4 PLATFORM] (28 IGNITION/GLOW PLUG SYSTEM - ST GENERIC SCAN TOOL))ST GENERIC SCAN TOOLDIAGNOSTIC MODE, SELECTINGDIAGNOSTIC MODE 5: CHECK OUTPUT OF OXYGEN SENSOR SIGNALSNOTES
2002 Volkswagen Golf GLS, 2.0 K, Standard
Diagnostic mode 5: Check output of oxygen sensor signals: Notes
2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION Notes
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
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 outputs of oxygen sensor signals 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. Refer to Diagnostic mode 3: Check DTC Memory
- Coolant temperature must be at least 80 ° C. Refer to Diagnostic mode 1: Check measured values
Work procedure
- Connect diagnostic tester. Refer to 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".
NOTE:
- When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1".
Vehicles with engine codes AFP and BDF:
- If either the V.A.G 1551/1552 Scan Tool (ST) or the VAS 5051/5052 Vehicle Diagnostic, Testing and Information System is used for checking the output of oxygen sensor signals, the respective oxygen sensor can be selected by pressing buttons 1 and 2:
- Button 1 = Bank 1 sensor 1,
- Button 2 = Bank 1 sensor 2.
Vehicles with engine code BJS:
- If the Vehicle Diagnostic, Testing and Information System VAS 5051 or the Vehicle Diagnostic and Information System VAS 5052 is used for checking the output of oxygen sensor signals, the respective oxygen sensor can be selected by pressing button 1, 2, 5 and 6:
- Button 1 = Bank 1 sensor 1,
- Button 2 = Bank 1 sensor 2,
- Button 5 = Bank 2 sensor 1,
- Button 6 = Bank 2 sensor 2.
| Test-ID: | Evaluation of oxygen sensor signal outputs |
||||||||||
| 01 | Rich to lean sensor barrier voltage | Refer to Evaluation test-ID 01: Rich to lean sensor barrier voltage ST-35 | |||||||||
| 02 | Lean to rich sensor barrier voltage | Refer to Evaluation test-ID 02: Lean to rich sensor barrier voltage ST-37 | |||||||||
| 07 | Minimum voltage at sensor for test cycle | Refer to Evaluation test-ID 07: Minimum voltage at sensor for test cycle ST-38 | |||||||||
| 08 | Maximum voltage at sensor for test cycle | Refer to Evaluation test-ID 08: Maximum voltage at sensor for test cycle ST-40 | |||||||||
| Test-ID: | Evaluation of oxygen sensor signal outputs |
||||||||||
| 129 | Actual value of oxygen sensor voltage | Refer to Evaluation test-ID 129: Actual value of oxygen sensor voltage ST-41 | |||||||||
| 130 | Control barrier voltage | Refer to Evaluation test-ID 130: Control barrier voltage ST-43 | |||||||||
| 131 | Dynamic value | Refer to Evaluation test-ID 131: Dynamic value ST-44 | |||||||||
| 132 | Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) | Refer to Evaluation test-ID 132: Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) ST-46 | |||||||||
- End diagnosis and switch ignition off.
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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.