Diagnostic mode 5: Check output of oxygen sensor signals
Function
The static values of the oxygen sensors are indicated via this diagnostic mode.
The values of the individual oxygen sensor signal outputs must reach the specified value or must be within the min.- and max.- limits.
Requirements
- Exhaust system must be properly sealed between catalytic converter module 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 sequence
- 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 desired output of oxygen sensor signals "Test-ID XX".
NOTE:
- Bank 1 = Cylinder bank 1, in direction of travel, right
- Bank 2 = Cylinder bank 2, in direction of travel, left
- When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1".
- If either the VAG1551/1552 Scan Tool (ST) or VAS5051/5052 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, 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.
- End diagnostic and switch ignition off.
Evaluation test-ID 01 Bank 1 and 2, sensor 2: Rich to lean sensor barrier voltage
| Oxygen sensor | Specified value: | ||||||
|
Fixed value: 0.631 V | ||||||
|
Fixed value: 0.631 V |
If specified value is not obtained:
- Replace respective oxygen sensor:
- Bank 1 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 6
- Bank 2 Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 10
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating
Evaluation test-ID 02 Bank 1 and 2, sensor 2: Lean to rich sensor barrier voltage
| Oxygen sensor | Specified value: | ||||||
|
Fixed value: 0.631 V | ||||||
|
Fixed value: 0.631 V |
If specified value is not obtained:
- Replace respective oxygen sensor:
- Bank 1 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 6
- Bank 2 Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 10
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating
Evaluation test-ID 07 Bank 1 and 2, sensor 2: Minimum voltage at sensor for test cycle
| Oxygen sensor | Specified value: | ||||||
| min. | max. | ||||||
|
0.031 V | 0.402 V | |||||
|
0.031 V | 0.402 V | |||||
If the specified value is exceeded:
- Oxygen sensor not ready for operation
- Oxygen sensor heater faulty:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC). Refer to Oxygen sensor heater for oxygen sensors behind Three Way Catalytic Converter (TWC), 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). Refer to Oxygen sensors and oxygen sensor regulation behind catalytic converter, checking .
Evaluation test-ID 08 Bank 1 and 2, sensor 2: Maximum voltage at sensor for test cycle
| Oxygen sensor | Specified value: | ||||||
| min. | max. | ||||||
|
0.501 V | 1.080 V | |||||
|
0.501 V | 1.080 V | |||||
If the specified value is not reached:
- Oxygen sensor not ready for operation
- Oxygen sensor heater faulty:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC). Refer to Oxygen sensor heater for oxygen sensors behind Three Way Catalytic Converter (TWC), 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). Refer to Oxygen sensors and oxygen sensor regulation behind catalytic converter, 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). Refer to Oxygen sensors and oxygen sensor regulation behind catalytic converter, checking .
Evaluation test-ID 129 Bank 1 and 2, sensor 1: Actual value of oxygen sensor voltage
| Oxygen sensor | Specified value: | ||||||
| min. | max. | ||||||
|
0.992 V | 1.078 V | |||||
|
0.992 V | 1.078 V | |||||
If specified values are not obtained:
- Replace respective oxygen sensor:
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 9
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating
Evaluation test-ID 130 Bank 1 and 2, sensor 1: Control barrier voltage
| Oxygen sensor | Specified value: | ||||||
| min. | max. | ||||||
|
0.992 V | 1.078 V | |||||
|
0.992 V | 1.078 V | |||||
If specified values are not obtained:
- Replace respective oxygen sensor:
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 9
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating
Evaluation test-ID 131 Bank 1 and 2, sensor 1: Dynamic value
| Oxygen sensor | Specified value: | ||||||
| min. | max. | ||||||
|
0.996 | 4.000 | |||||
|
0.996 | 4.000 | |||||
If specified values are not obtained:
- Replace respective oxygen sensor:
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 9
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating
Evaluation test-ID 132 Bank 1 and 2, sensor 1: Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) (bank 1 and 2, sensor 2)
| Oxygen sensor | Specified value: | ||||||
| min. | max. | ||||||
|
-0.03 | 0.03 | |||||
|
-0.03 | 0.03 | |||||
If specified values are not obtained:
- Replace respective oxygen sensor:
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to Exhaust manifold/ catalytic converter module with front exhaust pipe and attachments , item 9
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating