P1233 = Fuel System Disabled Or Offline
P1131 = HO2S 11 Indicates Lean
P1151 = O2 Sensor Heater Circuit Signal Intermittent (Bank 2 Sensor 1)
Now there’s a doozy of combinations of codes - 1131 and 1151 would have me looking to the heated O2 sensor on bank 2, but that is no guarantee that anything is wrong with that sensor. IF it were bad, though, it could certainly throw both those codes. I’m not sure if it could throw 1233 as well (that could be a secondary or a primary fault). If its just a heated 02 sensor, the repair shouldn’t be too bad. I’ve never replaced them on my 97, but I’m guessing (SWAG) parts would run $50-100 and labor should be no more than $30-40 (whatever your half hour labor cost is). But there’ll probably be a $70 diagnostic in there as well to guarantee that that’s the problem…
But then 02 codes are often secondary faults, not primary ones. But I’ve never seen 1151 as a secondary fault…