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problems starting Codes 232 and 123

91 940 16v will not start unless foot is on the accelerator (does not idle). I read diagnostic codes and came up with 2 for the fuel port.

2-3-2 Oxygen Sensor
1-2-3 ECT Sensor

Are they both bad? Or is one causing the other to fault?

I would hate to buy a oxygen sensor as they are pricey and then find out that it doesn't help.

Any recommendations?







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