Audi Audi S4 2009-2016 Emissions & Sensors Specifications
Detailed technical specifications and documentation for the emissions sensors system in the 2009-2016 Audi S4. Includes sensor types, diagnostic codes, wiring diagrams, and maintenance procedures.
Overview Specifications
Comprehensive description of the emissions_sensors specifications for the 2009-2016 Audi S4, including key features, measurements, and technical details
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Key Specifications
O2 Sensor Voltage Range
0.1V to 0.9V
NOx Sensor Measurement Range
0-2000 ppm
EGT Sensor Operating Range
-40°C to 1000°C
MAF Sensor Measurement Range
0-500 kg/h
O2 Sensor Heater Resistance
6-10 ohms at 20°C
Available Specifications
Oxygen (O2) Sensors
Details about the oxygen sensors used in the 2009-2016 Audi S4, including their role in monitoring exhaust gases and ensuring optimal fuel-air mixture.
Oxygen (O2) Sensors
Details about the oxygen sensors used in the 2009-2016 Audi S4, including their role in monitoring exhaust gases and ensuring optimal fuel-air mixture.
Front O2 Sensor Specifications
- Located in the exhaust manifold, pre-catalytic converter
- Operating temperature range: -40°C to 900°C
- Output voltage range: 0.1V to 0.9V
- Response time: <100ms
- Heater resistance: 6-10 ohms at 20°C
Rear O2 Sensor Specifications
- Located post-catalytic converter
- Operating temperature range: -40°C to 850°C
- Output voltage range: 0.1V to 0.9V
- Response time: <120ms
- Heater resistance: 6-10 ohms at 20°C
Note: Rear O2 sensors are primarily used to monitor catalytic converter efficiency.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors, which measure nitrogen oxide levels in the exhaust system to comply with emissions regulations.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors, which measure nitrogen oxide levels in the exhaust system to comply with emissions regulations.
NOx Sensor Specifications
- Located in the exhaust system, post-catalytic converter
- Operating temperature range: -40°C to 950°C
- Measurement range: 0-2000 ppm
- Accuracy: ±5% of reading
- Heater power consumption: 12W at 12V
NOx Sensor Diagnostics
- Self-diagnostic capability for fault detection
- Error codes stored in ECU for troubleshooting
- Typical lifespan: 100,000 miles
- Replacement interval: As per diagnostic codes or performance degradation
Note: NOx sensors are critical for vehicles equipped with Selective Catalytic Reduction (SCR) systems.
Exhaust Gas Temperature (EGT) Sensors
Information about the EGT sensors used to monitor exhaust gas temperatures and protect engine components from overheating.
Exhaust Gas Temperature (EGT) Sensors
Information about the EGT sensors used to monitor exhaust gas temperatures and protect engine components from overheating.
EGT Sensor Specifications
- Located in the exhaust manifold and downpipe
- Operating temperature range: -40°C to 1000°C
- Output signal: 0-5V analog
- Response time: <200ms
- Accuracy: ±2% of reading
EGT Sensor Applications
- Monitors exhaust gas temperature for turbocharger protection
- Provides data for emissions control systems
- Critical for preventing catalytic converter damage
- Integrated with ECU for real-time adjustments
Note: EGT sensors are essential for high-performance engines with turbocharging.
Mass Air Flow (MAF) Sensor
Details about the MAF sensor, which measures the volume and density of air entering the engine for optimal combustion.
Mass Air Flow (MAF) Sensor
Details about the MAF sensor, which measures the volume and density of air entering the engine for optimal combustion.
MAF Sensor Specifications
- Located in the intake air duct
- Operating temperature range: -40°C to 120°C
- Output signal: 0-5V analog or PWM
- Measurement range: 0-500 kg/h
- Accuracy: ±2% of reading
MAF Sensor Maintenance
- Regular cleaning recommended to prevent contamination
- Typical lifespan: 150,000 miles
- Replacement interval: As per diagnostic codes or performance degradation
- Critical for maintaining fuel efficiency and emissions compliance
Note: A faulty MAF sensor can lead to increased emissions and reduced engine performance.
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Component Specifications
Oxygen Sensors
- Type
- Wideband zirconia oxygen sensor
- Location
-
- Upstream of catalytic converter
- Downstream of catalytic converter
- Part Numbers
-
- 06E906262C
- 06E906262D
- Operating Temperature Range
- -40°C to 900°C
- Response Time
- < 100 ms
- Voltage Output Range
- 0.1V to 4.9V
- Tolerance
- ±2% of reading
Nitrogen Oxide Sensors
- Type
- NOx sensor
- Location
- Downstream of SCR catalyst
- Part Number
- 4G0907262A
- Operating Temperature Range
- -40°C to 800°C
- Measurement Range
- 0 ppm to 1000 ppm
- Accuracy
- ±5 ppm
- Response Time
- < 500 ms
Exhaust Gas Temperature Sensors
- Type
- Thermocouple-based temperature sensor
- Location
-
- Upstream of turbocharger
- Downstream of catalytic converter
- Part Numbers
-
- 06E906088A
- 06E906088B
- Operating Temperature Range
- -40°C to 1000°C
- Accuracy
- ±2°C
- Response Time
- < 200 ms
Mass Air Flow Sensor
- Type
- Hot-film air mass sensor
- Location
- Intake air duct
- Part Number
- 06E906461A
- Measurement Range
- 0 kg/h to 1000 kg/h
- Accuracy
- ±2% of reading
- Operating Temperature Range
- -40°C to 120°C
Catalytic Converter Efficiency Sensors
- Type
- Dual oxygen sensor system
- Location
-
- Upstream of catalytic converter
- Downstream of catalytic converter
- Part Numbers
-
- 06E906262C
- 06E906262D
- Efficiency Threshold
- > 95% conversion efficiency
- Diagnostic Criteria
- Oxygen storage capacity and lambda value comparison
Evaporative Emissions System Sensors
- Type
- Pressure sensor
- Location
- Fuel tank
- Part Number
- 4H0906583A
- Measurement Range
- -10 kPa to +10 kPa
- Accuracy
- ±0.5 kPa
- Response Time
- < 100 ms
Differential Pressure Sensors
- Type
- Piezoresistive pressure sensor
- Location
-
- DPF inlet
- DPF outlet
- Part Number
- 03L906051C
- Measurement Range
- 0 kPa to 50 kPa
- Accuracy
- ±0.2 kPa
- Response Time
- < 50 ms
Lambda Sensors
- Type
- Planar zirconia oxygen sensor
- Location
-
- Upstream of catalytic converter
- Downstream of catalytic converter
- Part Numbers
-
- 06E906262C
- 06E906262D
- Lambda Range
- 0.7 to 1.3
- Accuracy
- ±0.01 lambda
- Response Time
- < 100 ms
Particulate Matter Sensors
- Type
- Soot particle sensor
- Location
- Exhaust system
- Part Number
- 4G0907261A
- Measurement Range
- 0 mg/m³ to 100 mg/m³
- Accuracy
- ±1 mg/m³
- Response Time
- < 300 ms
Diagnostic Specifications
- Onboard Diagnostics
- OBD-II compliant
- Fault Codes
-
- P0135
- P0141
- P0420
- P0430
- P2201
- Diagnostic Tools
-
- VAS 5054A
- ODIS
- Diagnostic Parameters
-
- Sensor voltage
- Response time
- Temperature readings
- Tolerance Checks
-
- ±2% for oxygen sensors
- ±5 ppm for NOx sensors
Service Information Service
Detailed service requirements and schedules for emissions sensors
- Inspect oxygen sensors for contamination
- Check NOx sensor functionality
- Verify exhaust gas temperature sensor readings
Replace sensors if readings are outside specified tolerances
- Replace oxygen sensors
- Inspect and clean particulate matter sensor
- Check evaporative emissions system sensor for leaks
Use OEM parts for replacements to ensure compatibility
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the function of the oxygen sensor (O2 sensor) in the 2009-2016 Audi S4?
What is the function of the oxygen sensor (O2 sensor) in the 2009-2016 Audi S4?
The oxygen sensor (O2 sensor) monitors the oxygen content in the exhaust gases. It provides real-time feedback to the Engine Control Unit (ECU) to optimize the air-fuel mixture for efficient combustion, ensuring compliance with emissions standards. The sensor operates at temperatures between 300°C and 850°C and has a response time of less than 100 milliseconds.
Q2 How often should the emissions sensors be replaced in the Audi S4?
How often should the emissions sensors be replaced in the Audi S4?
Audi recommends inspecting the emissions sensors every 60,000 miles (96,000 km). Replacement intervals vary based on driving conditions, but the oxygen sensors typically last between 80,000 and 100,000 miles (128,000 to 160,000 km). Fault codes or reduced fuel efficiency may indicate the need for earlier replacement.
Q3 What are the symptoms of a failing NOx sensor in the Audi S4?
What are the symptoms of a failing NOx sensor in the Audi S4?
A failing NOx sensor may trigger the Check Engine Light (CEL) and cause error codes such as P2201 or P229F. Symptoms include reduced engine performance, increased fuel consumption, and failure to pass emissions tests. The NOx sensor is critical for monitoring nitrogen oxide levels in the exhaust system, particularly in vehicles equipped with Selective Catalytic Reduction (SCR).
Q4 Can I replace the emissions sensors myself, or should I consult a professional?
Can I replace the emissions sensors myself, or should I consult a professional?
While it is possible to replace emissions sensors yourself, it is recommended to consult a professional technician. Proper installation requires specialized tools, such as an O2 sensor socket, and knowledge of the ECU system. Incorrect installation can lead to damage, void warranties, or cause improper sensor readings.
Q5 What is the voltage range for the oxygen sensors in the Audi S4?
What is the voltage range for the oxygen sensors in the Audi S4?
The upstream oxygen sensor (pre-catalytic converter) typically operates within a voltage range of 0.1V to 0.9V, fluctuating rapidly under normal conditions. The downstream sensor (post-catalytic converter) should show a more stable voltage, usually between 0.45V and 0.5V, indicating proper catalytic converter function.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Audi S4 Emissions System Overview
Coming SoonDetailed guide on the emissions control system, including sensor locations, functions, and diagnostic procedures.
Oxygen Sensor Replacement Guide
Coming SoonStep-by-step instructions for replacing oxygen sensors in the 2009-2016 Audi S4, including torque specifications and safety precautions.
NOx Sensor Diagnostics and Troubleshooting
Coming SoonComprehensive troubleshooting guide for NOx sensor issues, including common fault codes and repair procedures.
Audi S4 Emissions Compliance Standards
Coming SoonOverview of emissions standards and regulations applicable to the 2009-2016 Audi S4, including Euro 5 and Euro 6 compliance.
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