Denso 234-4286 Oxygen Sensor - Downstream Left or Downstream Right

Overview of the Denso OE Style Oxygen Sensor 234-4286

The Denso OE Style Oxygen Sensor 234-4286 is designed for precise emission control in select General Motors vehicles. This heated oxygen sensor features a specific fitment for models such as the Chevrolet Silverado 1500 HD, GMC Sierra 2500 HD, and Cadillac Escalade ESV, ensuring accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4-wire design for reliable operation
• Specific fitment for Cadillac, Chevrolet, GMC, Pontiac, and Saturn vehicles
• Threaded mounting type with 0.708-inch thread diameter
• 21.65-inch wiring harness length with male connector
• Part number 234-4286 for precise identification and compatibility

Detailed Features and Specifications

This Denso oxygen sensor belongs to the OE Style product line, which focuses on delivering original equipment quality and fitment. The OE Style line is engineered to meet or exceed factory specifications, providing a direct replacement for the original sensor. The 234-4286 sensor includes a heated element to reduce warm-up time and improve emissions control under various operating conditions.

With a 4-wire configuration and a male connector, this sensor ensures proper electrical connections and communication with the vehicle’s engine control unit. The 21.65-inch wiring harness length allows for straightforward installation without the need for extensions or modifications. The threaded mounting type with a 0.708-inch diameter matches factory mounting points for secure attachment.

Compatible Vehicles and Applications

This oxygen sensor is specifically designed for use in the following makes and models:

• Cadillac Escalade ESV
• Chevrolet Silverado 1500 Classic, HD, and HD Classic
• GMC Sierra 1500, 2500, 3500, and their HD and Classic variants
• Pontiac G6 and Aura
• Saturn models including the Aura
• Chevrolet Suburban 2500 and Yukon XL 1500/2500

Common Issues Addressed by the Denso 234-4286 Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor malfunction
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor degradation

Installation Notes and Tips

When installing the Denso 234-4286 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 0.708-inch threaded sensor to prevent damage. Verify the wiring harness length and connector gender match the vehicle’s factory harness to avoid electrical issues. It is recommended to apply anti-seize compound on the threads to facilitate future removal.

Quality Assurance and Warranty

Denso’s OE Style oxygen sensors are manufactured to meet original equipment standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship. Using a sensor from the OE Style line helps maintain factory-level emission control and engine management system integrity.