p1137 p0422 po302; need help

[1fstavant]

i know what they are but what could cause them, the car developed a check engine light and then tonite idling it started to misfire only briefly. my setup puts the maf right next to the turbo, could this be a maf issue or a 02 sensor, and could that brief mis hurt my motor

[aaronamerica]

p1137-fuel trim too low at idle (bank 1)

p0422-catalyst system efficiency below threshold (bank1)

po302-cylinder no. 2 misfire detected


I got these readings from my Haynes repair manual book I bought at autozone which always helps me out when I need it



I would start by checking cylinder 2 spark plug and also the o2 sensor

[Seerlah]

If you look up the codes here, they list possible symptons, causes, and solutions.

[aaronamerica]

If you look up the codes here, they lost possible symptons, causes, and solutions.

nice link