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P0191 Diagnostic Trouble Code Discussion for August 2007

Fuel Rail Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2003 Mercury Sable LS 3.0L No Start, Cuts out VIN: 1MEFM55S33
P0191: fuel rail pressure sensor circuit performance. ... complaint of no start condition when hot. Pulled codes with NGS and found P0191, fuel rail pressure performance. Monitored fuel pump sensor and fuel pressure gauge, both read normal at that time. Checked electrical connection at fuel pump, ok, not melted l...
August 21, 2007