98 Explorer oxygen sensors.

[grizzlykev]

i have a 98 explorer that the oxygen sensors r reading minus 100 all the time took it to my wonderful dealr got charged 1100 and came back the same way replaced mass air flow sensor tune up new cylc heads intake gskts plugs wires and now also injectors again by dealer runs but doesnt seem right po1151 dtc any sugestions?? thanks in advance

 

[BrooklynBay]

Welcome to this forum! I've moved your thread to the stock 95-01 section.

 

[chance942]

Holy sh*t did i read that right?? New cylinder heads? $1100 to replace o2s?? How long ago was your last visit to these thieves? They are really shaddy about their warranties but I suggest you read all that fine print on the back of your reciept. Sounds like they owe you a new car.

 

[grizzlykev]

no it was 1100 to replace the new injectors that i allready did and came back with the same problem i sent it there with they r crooks i wont go back there they said no codes present but it has po1151 codes and oxygen sensors not working according to my comp so im lost

 

[chance942]

IAC maybe? Do you have a six wire MAF? If not you might check the IAT sensor. What do you mean by comp? the code is P1151-fuel metering. Yes o2s regulate that but I believe it best to make sure everything upstream is working properly. o2s in actuality are just monitors that try to compensate for any BS goin on up top.

Now you say that they "r - 100". not heating up all the way? if that is the case then yes them malfunctioning like that will have a direct effect on fuel air ratio. in case you don't know only the the o2s upstream of the cats have any effect on this. don't bother with the aft sensors.

I guess your comp should show you IAT,etc. If you trust your diagnostic tool,change out your forward o2s.