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2006 Isuzu NPR 5.2L Intermittent Driveabality Problem
Posted to HD/Fleet Forum on 2/10/2009 4 Replies

Hi All,

Having intermittent problems with this truck. Get code P0087 fuel pressure too low and P0091 fuel pressure regulator solenoid 1 control circuit low voltage. Code P0091 puts the truck to idle. Caught the problem one time in the shop when the actual fu... Login to read more.

4 Replies Received (View Replies)