Natural Gas Engines EGR Differential Pressure Sensor Part Number Incorrect in QSOL Parts Catalog - QSOL Reference: TSB200175. The parts catalog on QuickServe® Online (QSOL) references the incorrect exhaust gas recirculation (EGR) differential pressure sensor, which may result in an incorrect EGR differential pressure sensor being installed on on-highway natural gas engines during a service event. Incorrect EGR differential pressure sensor part number being installed can lead to incorrect repair and possibly repeat repairs.

Midrange Diesel Engines New EGR Differential Pressure Sensor Part Number - QSOL Reference: TSB200171. In the future, only EGR differential pressure sensor, Part Number 4358939, will be

available for service, this will apply to both heavy duty and midrange engine products.