hey guys, 03 f250, 5.4. the check engine light came on, i scanned it. it said my o2 sensor(not a problem to fix) but then it said heater circut malfunction. did some research in haynes. says check fuses etc. just wanted to see if i could get some advice before i started going through the trial and error process. thanks

 

Yea, The O2 has a pre-heat circuit. you need to post this on the V-8 gas forum. They can help you better than us diesel guys!

 

thanks!

 

Just so you know though...This isn't just a diesel forum (it's for ALL Super Duty's ~ V8 and V10 gassers participate in the fun here also) so maybe another gasser will chime in. However, you may have better luck on the other forum as it is specific to your engine. Still, check back here too.

Good luck amigo.