2007.5-2010 LMM Duramax Rail Pressure Sensor - E05 10421

Are you seeing intermittent rail pressure fluctuations that are causing running issues? The rail pressure sensor may be the root cause.

 

The fuel pressure sensor is a crucial part of the high pressure fuel system. It effectively measures fuel pressure allowing for proper pressure control from the ECU. A faulty or failing sensor can cause serious running issues and potential system failure due to over pressure. If the connector is broken or cracked, water could be introduced to the terminals also causing incorrect information relayed back to the ECU. 

 

Note: A professional diagnosis is recommended to ensure the rail pressure sensor is the cause of your issues. If mis-diagnosed and the rail pressure sensor does no fix your issue it can not be returned once it has been installed.