what were the codes? With these cars some of the sensors will report a problem directly (thus you get a very specific code) while other codes (like a fuel trim code) can point to a list of possible causes. Generally speaking when an engine loses full power it can be either a fuel delivery problem (ie not enough fuel pressure) or an air mix problem (vacuum leak, torn air boot, any number of sensors feeding the ECU).

 

 

Considering you have a happy meal of codes with three different high inputs, you may need to check to see if there's any commonality in the wiring, ie all on the same fuse (so check fuses first) or all share a ground point. I'd be surprised if both the MAF and intake air temp sensor would go bad at the same time unless there's some commonality.

To dive a bit into the O2 sensor and lean mix issue, the P0032 is telling you the heater element in the front O2 sensor (which controls the fuel mix) is shorted. This can be the wiring to the sensor, the sensor, or upstream from the connector. O2 sensors have four wires - two for the heater element (12v, return) two for the sensor - voltage, return). You can find the wire colors on line but test for 12V to the heating element at the connector, then test for resistance on the wiring to from the heater - if its zero the cable or element may be shorted. If you are lucky you may find a pinched cable otherwise you may need to replace the front O2 sensor. My sense is the P2177 code is related to this considering if the sensor can't get to operating temp, the lamba voltage controlling the mixture will be off.

 

My upstream 02 sensor went out at 160K. How many miles on your car?
The code I got was specific and the drop in fuel mileage was immediate.
I don't recall experiencing an RPM limit.