trouble code help

[tloftis]

My truck is running rough. the codes it is throwing is

PO301 cyl 1 misfire

PO304 cyl 4 misfire

PO153 02 sensor Bank 2 Censor 1

PO102 MAF or VAF A circuit low input

I am not sure what to replace. It runs like it has water in the fuel, which it does not. but, that is what it acts like.

 

[Mirage]

I wouldn't replace anything just yet. First thing that comes to mind is the last code regarding the MAF sensor low input. Check the MAF sensor, clean it and check the wiring connections. Then check to see if it runs any better. A bad MAF sensor, wiring etc will cause the PCM ot over or under compensate and that may very well be why you're seeing the codes for misfire on cyl 1 and 4, which in turn will lead to O2 sensor problems as it could be loading up with un-burnt fuel.

Hope this helps.

 

[tloftis]

changed the MAF and it started to work fine. all other symptoms went away.

 

[Mirage]

Glad to hear it! Glad you're back on the road.

 

[tloftis]

thanks for all the help! for future use, the MAF was making all the other codes come on. Now they are gone.