HAVE A 2002 ACCENT I SMELL GAS AFTER DRIVING, NOT WHEN PARKED OVER NIGHT. REPLACED THE 02 SENSOR. CODE P0133 AND P0732 SHOWING.NO GAS LEAKS UNDER CAR. CHECKED TAILPIPE NO GAS SMELL.
P0133 Oxygen sensor slow response Bank 1 Sensor 1 P0732 2nd gear malfunction The fuel smell you have is from the fuel pump, the fuel pump location is on top of the fuel tank, you access the fuel pump by removing the rear seat. For P0133 you vehicle has a flex pipe, exhaust if there is a exhaust leak which is prior to the upstream 02 sensor you will set a P0133. As for the P0732 which is 2nd gear malfunction it is very likely that the kick down servo switch could be faulty,
By removing the back seat , and remove it access cover you can inspect the fuel pump for leak , this should be the first priority as it can also set a P0133
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