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P0191 Diagnostic Trouble Code Discussion for April 2012

Fuel Rail Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2008 Mercedes-Benz CLK63 AMG 6.3L MIL Lamp on VIN: WDBTJ77H48
P0191: Fuel Pressure Sensor Upper Limit Reached. Hey All, I have a recurring intermittent code for The fuel pressure sensor reaching its upper limits. I have replaced the fuel pressure sensor, as well as both fuel pumps. anyone had any experience with this issue? Vehicle appears to run perfect. the only thi...
April 03, 2012
2008 Ford E-350 Super Duty 6.8L MIL Lamp on VIN: 1FD3E35S08
P0191: Fuel pressure sensor circuit range performance. We have a code P0191 and no driveability issues. IDS scan shows 0.7 PSI fuel pressure and code is on. Removed sensor and tested fuel pressure - 50 PSI KOEO. Replaced the sensor with new Ford and still show no fuel pressure on the IDS. Checked 5V ref and ground...
April 16, 2012