It sure could be, BUT not the EGR, the MAP and TPS share the same 5 volts
out of the PCM on pin 61 C1 connector, vt/wt wire. The EGR valve does not.
If you were able to read the codes did you notice if all these codes were
set at the same key start??? I would bet the EGR valve wasnt.
But anyway, check for 5 volts out of the PCM on pin 61 , if there is 5
volts.... pin out the connectors, if there isnt any voltage, then back track
till you find it
The EGR valve transducer should have 12 volts (key on) at the DB/wt wire and
gets a ground at pin 40 gy/yl wire in the C2 connector
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