Delphi ES20000 Oxygen Sensor - Front, Rear or Rear Right

Delphi ES20000 Heated Oxygen Sensor Overview

The Delphi ES20000 is a heated oxygen sensor designed for precise emission control in select Buick, Cadillac, Chevrolet, GMC, and Isuzu vehicles. Engineered with a 4-wire configuration and a square connector shape, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for fast response
• Square connector shape for secure and reliable connection
• Thread size of 18 x 1.5 mm for proper fitment
• Overall length of 375.0 mm to match OEM specifications
• Includes oxygen sensor and instruction sheet for installation guidance
• Compatible with front, rear, and rear right positions depending on vehicle

Technical Details and Compatibility

The Delphi ES20000 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. The 4-wire setup includes two wires for the heater circuit and two for the sensor signal, ensuring accurate voltage output to the engine control unit (ECU). The square connector shape provides a secure fit, minimizing the risk of disconnection or signal loss. With a thread size of 18 x 1.5 mm and an overall length of 375.0 mm, this sensor matches the original equipment specifications for proper installation.

This sensor is compatible with a range of vehicles including Buick Lucerne, Cadillac Escalade and DTS, Chevrolet Silverado 1500 and Avalanche 1500, GMC Sierra 1500 and Savana 3500, and Isuzu Ascender models. The ES20000 is designed for front, rear, and rear right positions depending on the specific vehicle application.

Common Applications and Problem Resolution

• Helps resolve rough idling caused by incorrect air-fuel mixture readings
• Reduces engine hesitation and stalling related to faulty oxygen sensors
• Improves fuel efficiency by providing accurate feedback to the ECU
• Assists in passing emissions tests by maintaining proper exhaust gas monitoring
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

Before installation, verify the sensor position (front, rear, or rear right) specific to your vehicle model. Use the included instruction sheet for guidance. Ensure the engine is cool to avoid burns and apply anti-seize compound to the sensor threads if recommended by the vehicle manufacturer. Tighten the sensor to the specified torque to prevent leaks or damage. Confirm the electrical connector matches the square shape for proper connection.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The ES20000 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. Consult your vehicle’s service manual or Delphi documentation for warranty terms related to this oxygen sensor.