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P0191 Diagnostic Trouble Code Discussion for April 2024

Fuel Rail Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0191
Help Request Posted
2014 GMC Terrain SLE 2.4L Reduced Power VIN: 2GKALREK1E
... one down. A few months ago I replaced the high pressure pump on this car for leaking fuel into the engine. Replaced it with a GM pump. Now it has this reoccurring issue with check engine light and reduced engine power light. It flags P0191 High pressu...
April 12, 2024