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Mercury Grand Marquis P1405 Code: Differential Pressure Feedback Sensor Circuit Upstream Hose Issue

Model: Mercury Grand Marquis Fault Code: P1405 Posted: 2006-10-10 13:52

Hello everyone, I'm currently encountering OBD II diagnostic code P1405 in my Mercury Grand Marquis. The code description is: 'Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose'. Can anyone explain what this error means and provide guidance on potential causes and solutions? Thank you for your help! Best regards, Imran

Related fault codes
P1405
Comments (1)
Anonymous 2006-10-10 15:30

The P1405 code typically points to an issue with the Differential Pressure Feedback (DPFE) sensor, particularly in the upstream hose. Common causes include a clogged or leaking hose, sensor failure, or vacuum leaks. Check for visible damage or blockages and ensure proper connections are secure.