Join Now
International Automotive Technicians Network

P1408 Diagnostic Trouble Code Discussion for May 2012

Manifold Absolute Pressure Sensor Signal Performance


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P1408
Help Request Posted
2003 Ford F-150 King Ranch 5.4L MIL Lamp on VIN: 1FTRW07L83
P1408: EGR low flow during KOER test. Came in for a mil light on. Code P0401 stored. Had no KOER codes. I have made sure everything is clean in the way of passages. Tried a factory DPFE and apply sol. It has 20 inches of vac. at sol. but will only apply 2 inches of vacume to egr valve during KOE...
May 03, 2012
2003 Ford F-150 King Ranch 5.4L MIL Lamp on VIN: 1FTRW07L83
P1408: EGR low flow during KOER test. Came in for a mil light on. Code P0401 stored. Had no KOER codes. I have made sure everything is clean in the way of passages. Tried a factory DPFE and apply sol. It has 20 inches of vac. at sol. but will only apply 2 inches of vacume to egr valve during KOE...
May 03, 2012