Hella 009409391 Exhaust Gas Differential Pressure Sensor

The Hella 009409391 is an exhaust gas differential pressure sensor designed to monitor pressure differences in diesel particulate filter (DPF) systems. This sensor plays a critical role in modern diesel engine emissions control by measuring the pressure drop across the DPF to determine when regeneration is needed.

Key Features:

• 3-pin electrical connector for reliable signal transmission
• Bolted mounting design for secure installation
• Precision pressure sensing technology for accurate DPF monitoring
• OE-quality construction meets strict automotive standards
• Engineered for durability in harsh exhaust system environments

This differential pressure sensor continuously measures the pressure before and after the diesel particulate filter, sending data to the engine control unit (ECU). When the pressure differential exceeds threshold values, it indicates filter loading and triggers DPF regeneration. Hella's sensor technology ensures accurate readings across the full operating temperature range, helping maintain optimal emissions performance and preventing DPF damage from excessive backpressure.