91z28 98ta

iTrader: (1)

Only at wide open throttle i get codes p0131 and p0151 which is circuit low voltage for both front oxygen sensors. the other day when we had a 50 degree morning it threw a p0135 code quickly after start up, which is oxygen sensor heater malfunction for front driver side. Today when i started it up an went down road it had some stuttering or hesitation whatever you want to call it, and after i warmed up it was fine and did not throw a code. The big question is will new O2's fix this and if so which brand should i go with????

thanks for any help and advice

DaveX

New 02's (bosch 13111) didn't solve this poblem for me. This is a very common problem with headers if you have them.