Delphi ES20116 Oxygen Sensor - Rear

Delphi ES20116 Heated Oxygen Sensor Overview

The Delphi ES20116 is a heated oxygen sensor designed for precise emission control in select Chevrolet, Pontiac, and Saturn vehicles. This rear-position sensor helps maintain optimal engine performance and fuel efficiency by accurately monitoring exhaust gases.

• Heated sensor type for faster warm-up and accurate readings
• Four-wire design ensuring reliable electrical connections
• Square connector shape for secure fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 760 mm for proper installation
• Includes oxygen sensor and instruction sheet

Technical Details and Compatibility

The Delphi ES20116 oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. Its four-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape and 18 x 1.5 mm thread size are engineered to fit rear exhaust positions on various models including Chevrolet Cobalt, Pontiac G5, Saturn Ion, Vue, and others. The 760 mm overall length provides adequate reach for installation in these vehicles.

Applications and Problem Solving

This oxygen sensor is used to monitor the oxygen content in the exhaust stream, enabling the engine control unit to adjust fuel delivery for optimal combustion. It is compatible with rear exhaust positions on multiple GM models, including Chevrolet HHR, L100, L200, L300, and Pontiac SC1, SC2, SL, SL1, SL2, SW2.

• Helps resolve poor fuel economy caused by incorrect air-fuel mixture
• Addresses rough idling or engine hesitation due to faulty oxygen sensor readings
• Reduces increased emissions by providing accurate exhaust gas data
• Prevents check engine light triggers related to oxygen sensor faults
• Supports proper catalytic converter function by maintaining correct fuel ratios

Installation Notes and Tips

When installing the Delphi ES20116 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the correct socket size for the 18 x 1.5 mm thread to prevent damage. Verify the square connector aligns properly with the vehicle harness to ensure a secure electrical connection. Follow the included instruction sheet for torque specifications and wiring guidance. It is recommended to inspect the exhaust system for leaks before installation to ensure accurate sensor readings.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications for durability and performance. The ES20116 undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Refer to the product documentation for exact warranty terms.