Infiniti QX70 2014-2017 Emissions & Sensors Specifications
Explore detailed specifications for the emissions sensors of the 2014-2017 Infiniti QX70. Learn about sensor types, locations, and technical details for diagnostics, maintenance, and repair.
Overview Specifications
This document provides detailed specifications and technical information about the emissions sensors in the 2014-2017 Infiniti QX70. It is designed to assist technicians, mechanics, and enthusiasts in understanding the emissions system, diagnosing issues, and performing maintenance. The document is organized into sections for easy navigation, with subsections breaking down key components and functionalities. Use the search and navigation instructions to quickly find the information you need.
How to Use
Use the search function to locate specific terms or components within the document. Enter keywords related to emissions sensors, such as 'O2 sensor' or 'catalytic converter,' to find relevant sections quickly.
Navigate through the document using the table of contents or by scrolling through sections. Each major section is labeled with a title, and subsections provide detailed information. Use the quick reference section for key specifications at a glance.
Key Specifications
O2 Sensor Voltage Range
0.1V - 0.9V
NOx Sensor Operating Temp
600°C - 800°C
Sensor Replacement Interval
60,000 - 90,000 miles
Diagnostic Tool Required
OBD-II Scanner
Sensor Thread Size
M18 x 1.5
Available Specifications
Emissions Sensor Overview
This section provides an overview of the emissions sensors in the 2014-2017 Infiniti QX70. It covers the purpose, location, and basic functionality of each sensor, including the oxygen (O2) sensors, NOx sensors, and temperature sensors. Understanding these components is essential for diagnosing and maintaining the vehicle's emissions system.
Emissions Sensor Overview
This section provides an overview of the emissions sensors in the 2014-2017 Infiniti QX70. It covers the purpose, location, and basic functionality of each sensor, including the oxygen (O2) sensors, NOx sensors, and temperature sensors. Understanding these components is essential for diagnosing and maintaining the vehicle's emissions system.
Oxygen (O2) Sensors
- Located in the exhaust system upstream and downstream of the catalytic converter.
- Monitor oxygen levels in exhaust gases to optimize air-fuel ratio.
- Provide feedback to the Engine Control Unit (ECU) for fuel injection adjustments.
- Typically replaced every 60,000 to 90,000 miles.
- Heated design for faster warm-up and accurate readings.
- Available in both wideband and narrowband configurations.
NOx Sensors
- Monitor nitrogen oxide levels in the exhaust system.
- Critical for vehicles equipped with Selective Catalytic Reduction (SCR) systems.
- Provide data to the ECU for urea injection control.
- Located downstream of the catalytic converter.
- Sensitive to contamination and high temperatures.
- Require periodic calibration for accurate readings.
Diagnostics and Troubleshooting
This section focuses on diagnosing and troubleshooting emissions sensor issues. It includes common symptoms of sensor failure, diagnostic procedures, and tools required for accurate testing. Proper diagnosis ensures timely repairs and compliance with emissions standards.
Diagnostics and Troubleshooting
This section focuses on diagnosing and troubleshooting emissions sensor issues. It includes common symptoms of sensor failure, diagnostic procedures, and tools required for accurate testing. Proper diagnosis ensures timely repairs and compliance with emissions standards.
Common Symptoms of Sensor Failure
- Check Engine Light (CEL) illuminated on the dashboard.
- Poor fuel economy and reduced engine performance.
- Failed emissions test or increased tailpipe emissions.
- Rough idling or engine misfires.
- Unusual exhaust odors or smoke.
- Error codes related to emissions sensors (e.g., P0130, P0420).
Diagnostic Tools and Procedures
- Use an OBD-II scanner to retrieve error codes.
- Perform live data analysis to monitor sensor readings.
- Inspect wiring and connectors for damage or corrosion.
- Test sensor voltage and resistance using a multimeter.
- Compare sensor readings to manufacturer specifications.
- Replace faulty sensors and clear error codes.
Maintenance and Replacement
This section outlines maintenance practices and replacement procedures for emissions sensors. It includes recommended intervals, tools needed, and step-by-step instructions for sensor replacement. Proper maintenance ensures optimal performance and longevity of the emissions system.
Maintenance and Replacement
This section outlines maintenance practices and replacement procedures for emissions sensors. It includes recommended intervals, tools needed, and step-by-step instructions for sensor replacement. Proper maintenance ensures optimal performance and longevity of the emissions system.
Recommended Maintenance Intervals
- Inspect emissions sensors during routine service every 15,000 miles.
- Replace O2 sensors every 60,000 to 90,000 miles.
- Calibrate NOx sensors every 50,000 miles or as needed.
- Check sensor wiring and connectors for wear annually.
- Clean sensors during catalytic converter maintenance.
- Follow manufacturer guidelines for specific replacement intervals.
Replacement Procedures
- Allow the exhaust system to cool before starting work.
- Disconnect the negative battery terminal for safety.
- Use a sensor socket or wrench to remove the old sensor.
- Apply anti-seize compound to the threads of the new sensor.
- Reconnect wiring and secure the sensor in place.
- Clear error codes and test the system after replacement.
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Component Specifications
Overview
- Type
- Oxygen Sensor (O2 Sensor)
- Configuration
- Dual-sensor setup (upstream and downstream)
- Platform
- Direct-fit for Infiniti QX70 2014-2017
- Material
- Zirconia ceramic element
- Location
- Exhaust system pre-catalytic and post-catalytic converter
Dimensions
- Sensor Length
- 3.15 inches (80 mm)
- Sensor Diameter
- 0.79 inches (20 mm)
- Thread Size
- M18 x 1.5
- Wire Length
- 23.62 inches (600 mm)
- Operating Temperature
- -40°F to 1472°F (-40°C to 800°C)
- Voltage Range
- 0.1V to 0.9V
- Response Time
- 20 milliseconds
Materials
- Sensing Element
- Zirconia ceramic
- Protective Sleeve
- Stainless steel
- Wiring Insulation
- High-temperature PTFE
- Connector
- Nitrile rubber
Features
- Performance
-
- Wideband oxygen sensing
- Fast response time
- High accuracy in lean and rich conditions
- Durability
-
- Corrosion-resistant stainless steel housing
- High-temperature tolerance
- Sealed connectors
- Compatibility
-
- Direct-fit for Infiniti QX70 models
- OEM-equivalent performance
- Compatible with factory ECU
- installation
-
- Pre-installed gasket
- Plug-and-play wiring
- Tool-free connector attachment
- Monitoring
-
- Real-time air-fuel ratio feedback
- Self-diagnostic capability
- Fault code generation for malfunction
Safety Features
- Electrical Safety
-
- Shielded wiring
- Short-circuit protection
- Environmental Safety
-
- Lead-free construction
- RoHS compliant
- Operational Safety
-
- Fail-safe mode
- Overheat protection
Comfort Features
- Noise Reduction
- Minimal vibration and noise
- Ease Of installation
- Pre-configured wiring harness
- Longevity
- Extended service life up to 100,000 miles
- Maintenance
- Self-cleaning heating element
Accessories
- installation Tools
-
- Oxygen sensor socket
- Anti-seize compound
- Wire crimping tool
- Replacement Parts
-
- Gasket
- Protective cap
- Wiring harness
- Diagnostic Tools
-
- OBD-II scanner
- Multimeter
- Signal analyzer
Maintenance
- Service interval
- Every 60,000 miles or 5 years
- Service Items
-
- Inspect sensor wiring
- Check for contamination
- Test voltage output
- Clean sensor threads
- Verify ECU communication
- Maintenance Notes
- Avoid silicone-based lubricants during installation
Warranty
- Standard Warranty
- Miles: 24,000Years: 2Coverage: Defects in materials and workmanship
- Extended Warranty
- Miles: 50,000Years: 5Coverage: Sensor functionality and performance
- Labor Warranty
- Miles: 12,000Years: 1Coverage: Installation-related defects
- Terms
- Warranty void if tampered with or improperly installed
Production Details
- Manufacturer
- NGK/NTK
- Manufacturing Process
-
- Precision ceramic element molding
- Automated assembly
- Laser welding
- Quality Control
- Testing: Voltage output test, Response time validation, Environmental stress testCertifications: ISO 9001, ISO 14001
- Sustainability Practices
-
- Recyclable materials
- Low-emission production
- Energy-efficient manufacturing
- Production Metrics
- Annual Output: 2 million unitsDefect Rate: 0.01%Lead Time: 4 weeks
Service Information for emissions_sensors Service
Maintenance and service requirements specific to emissions sensors
- Inspect sensor for physical damage
- Check wiring for wear or corrosion
- Test sensor voltage output
- Verify ECU communication
- Clean sensor threads if needed
Use anti-seize compound on threads during reinstallation
- Perform full diagnostic scan
- Test sensor response time
- Check for contamination
- Inspect exhaust system for leaks
- Replace sensor if necessary
Ensure proper torque during installation
- Replace sensor as preventive maintenance
- Inspect entire exhaust system
- Verify air-fuel ratio accuracy
- Check for ECU fault codes
- Test heating element functionality
Use OEM or equivalent replacement parts
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Are the emissions sensors compatible with other Infiniti models?
Are the emissions sensors compatible with other Infiniti models?
The emissions sensors for the 2014-2017 Infiniti QX70 are specifically designed for this model and may not be compatible with other Infiniti vehicles. These sensors are calibrated to meet the unique emissions control requirements of the QX70's engine. Always verify part numbers and consult the manufacturer or a certified technician to ensure compatibility with other models.
Q2 What maintenance is required for the emissions sensors?
What maintenance is required for the emissions sensors?
Regular maintenance for emissions sensors includes periodic inspections to ensure they are functioning correctly. Check for error codes using an OBD-II scanner every 6 months or 6,000 miles. Clean the sensors during routine service to prevent buildup of contaminants. Replace the sensors as recommended by the manufacturer, typically every 100,000 miles, or if diagnostic tests indicate a malfunction.
Q3 How do I replace the emissions sensors in my Infiniti QX70?
How do I replace the emissions sensors in my Infiniti QX70?
To replace the emissions sensors, first, locate the sensors in the exhaust system. Disconnect the electrical connector and use a wrench to remove the old sensor. Apply anti-seize compound to the threads of the new sensor and install it, tightening to the specified torque. Reconnect the electrical connector and clear any error codes using an OBD-II scanner. Always refer to the service manual for detailed instructions.
Q4 What should I do if my emissions sensor is malfunctioning?
What should I do if my emissions sensor is malfunctioning?
If your emissions sensor is malfunctioning, first check for error codes using an OBD-II scanner. Inspect the sensor for physical damage or contamination. Clean the sensor if necessary. If the issue persists, test the sensor's electrical connections and voltage. Replace the sensor if it fails diagnostic tests. Consult a certified technician if you are unable to resolve the issue.
Q5 How can I optimize the performance of my emissions sensors?
How can I optimize the performance of my emissions sensors?
To optimize performance, ensure your vehicle’s engine is properly tuned and the fuel system is clean. Use high-quality fuel and follow the manufacturer’s maintenance schedule. Avoid short trips that prevent the sensors from reaching operating temperature. Regularly inspect and clean the sensors to prevent contamination. Properly functioning sensors contribute to better fuel efficiency and lower emissions.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Infiniti QX70 Emissions System Service Manual
Coming SoonDetailed guide covering the emissions system, including sensor locations, diagnostics, and replacement procedures.
Technical Service Bulletin: Emissions Sensor Updates
Coming SoonLatest updates and fixes for emissions sensors in the 2014-2017 Infiniti QX70.
Infiniti QX70 Parts and Accessories Catalog
Coming SoonComprehensive catalog of OEM parts and accessories, including emissions sensors and related components.
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