1992 Chevy Lumina code 23 and code42

1992 CHEVROLET LUMINA
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APRILCLEAVER
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Computer problem
1992 Chevy Lumina Front Wheel Drive Automatic
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what do the codes run in this car. code 23 MAT is too low and code 42 Electronic spark timing monitor error. what do i need to buy to fixes this car.
Aug 27, 2008 at 6:24 PM
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DNAPRORACING
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code 23
mat sensor - signal voltage is low or high
OR
tps sensor
OR
mixture control solenoid - open or short circuit probs

code 42
electronic spark timing circuit open or shorted during engine run
OR
direct ignition system fault
OR
fuel cutoff relay circuit open or shorted to ground.
Aug 29, 2008 at 8:45 PM