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DeathBlade556
03-21-2010, 12:35 AM
Well, I was dring back from welding on the baja car last night and I got a CEL so checked the codes this morning and its P0137 Bank 1 O2 sensor low volts and P0138 Bank 1 O2 sensor High volts. So bad sensor or something else?

jlovbasz3
03-21-2010, 12:46 AM
might be an exhaust leak,i had codes close to that on my van when the manifold cracked and my old zj with a bad manifold.

limegreentj
03-21-2010, 01:17 AM
most likely an o2 sensor, look back at my threads (i think it was "i wish my jeep was on the road") or something like that...i chased many many codes.

edit: but yeah my money is on an o2 sensor

steveg0690
03-21-2010, 08:10 AM
Could be the O2 sensor...There are a lot of things that can cause an O2 sensor to malfunction...trust me on this one. Especially if there are 2 of them reading incorrecty. That sounds to me that your fuel is either too rich or too lean. Check your air filter and fuel volume, not pressure.

limegreentj
03-21-2010, 09:32 AM
i changed my MAF sensor, o2 sensor, and had to fix my fuel canister, but yours is most likely those 2 things. there is also a link in that thread, (i think) where you can buy o2 sensors pretty cheap

justin'sbig7
03-21-2010, 09:54 AM
i would really go through some diag steps before throwing a sensor at it. there should be a diagnostic flowchart online for whatever vehicle it is. follow that.... two at once makes me think something other than 02 sensors, check grounds.... one high, one low = hmmmm.. odd