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2-3-2 means the target range for fuel trim (fuel mix) isn't being achieved at idle (as determined by the O2 sensor). The good news is I highly doubt it's a failed ECU and your year is one past the troublesome ones. It could mean a faulty O2 sensor, but other areas are more common. Yes, this could mean one or more injectors aren't delivering enough fuel, but it's not particularly common for injectors to become plugged. There may be some build up of deposits on the ends if you run low grade gas and do lots of city driving. Make sure you are using a quality gas of the recommended octane (92 for the B234F as I recall) and with good injector additives (like Chevron with Techron). You should note that B234F's easily choke up when primarily driven in the city as they rev fairly low. Some extended high rev driving on the highway will often burn off accumulated deposits.
I'd be more suspicious of a fuel pressure regulator problem -probably just starting to go south. Check to make sure the vacuum line to your fuel pressure regulator is connected, not split at the ends and the fitting on the intake manifold is clean. There should be a quick test in the FAQ you can use to do a basic check of FPR operation. A proper check requires measuring pressure on the fuel rail. Unless it's been replaced in living memory, in my opinion it would not be unreasonable to replace the FPR on spec unless you can come up with a better idea.
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Dave -not to be confused with a real expert
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