03 MONTE CARLO AFTER CAR WARMS UP RUNS ROUGH LOW IDLE STALLS OUT HARD TO START on 2003 Chevrolet Monte Carlo

HAVE PULLED CODES GOT VARIOUS CODES P0420 FOR CAT. CONVERTER, P1107 FOR MAP SENSOR, P0122 FOR TPS, AND ALSO A O2 SENSOR CODE, HAVE CHANGED MAP SENSOR AND TPS SENSOR STILL NO CHANGE IN CONDITION

Asked by of Royal Palm Toyota for the 2003 Chevrolet Monte Carlo
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