[shorod]

The P1151 code is defined as P1151 - Lack of HO2S-21 Switch, Sensor Indicates Lean per the service manual. This makes sense if the fuel injectors are not triggering.

Camshaft position sensor / synchronizer would be logical, but before going that route I'd suggest you attempt to determine if the injectors are not firing due to a lack of battery voltage or ground signal. I suspect it will be the ground signal since if it were battery voltage all three would drop out at the same time and likely stall the engine. The only reason I suggest confirming the power though is because I came across a Duratech engine once that had a bad connector for the front bank of injectors.

-Rod