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P091 Diagnostic Trouble Code Discussion for February 2007


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Trouble Ticket Help Requests for DTC P091
Help Request Posted
1993 Cadillac DeVille 4.9L Excessive Emissions VIN: IG6CD53B9P
P091: PRNDL mal. I've got a Caddy really testing me, PLEASE HELP! It runs very rich, as shown in the gas readings. I've disconnected the fuel regulator hose (no sign of fuel there)& disconnected & plugged the canister hose @ throttle body. I fired the injectors individ...
February 23, 2007