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Discussion Starter #1
I have the PO175 engine code.The car is running great but MPG seems bad..what can i fix or what does it mean ,,,google has not helped..my sct says to rich +rep
 

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Nile P. Pezdel of Pez Dispenser Inc. CCA
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5,502 Posts
MPG being bad and a code for being too rich on Bank 2? Noticing any bogging at low RPMs? Do you feel like you have to clear it before it gets up and goes? It can't be terribly rich if it feels fine. Possibilities: 02 sensor gone bad, you had a misfire or your fuel pressure regulator is on the fritz. I guess I'd rule out #2 since this seems to be a long-term issue. I suppose it could be the MAF, but that would probably throw PO174 as well... If you have cheapo aftermarket plugs, that could also be causing an issue.

In conclusion, you should check: 02 sensors and MAF. These are the easiest to deal with. If nothing, check the fuel pressure regulator, plugs and COPs. If still throwing codes, I dunno? Leaking injector on bank 2?

Just discovered this wonderful link:
http://repairpal.com/OBD-II-Code-P0172-and-P0175
 
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Discussion Starter #3
whats the best way to check sensor's see if there fryed ???dust them off
 

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Nile P. Pezdel of Pez Dispenser Inc. CCA
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5,502 Posts
Need an A/F gauge to check. Then you just need to check it and see if it reads full rich and full lean.
 
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