help with codes

[brylac]

hey guys, kind of a newbie more like a lurker.

anyway

i'm getting code 133 Bank 1 Sensor 1 for my O2 sensor. replaced it. and let it run for a little while, then the check enging light came back on with the same codes.

should i have replaced all 3 sensors? also 3 hearter circut codes came up.

 

[Shadow_D]

Welcome to the Zone! >

What are all the codes you are getting?

 

[brylac]

Welcome to the Zone! >What are all the codes you are getting?

22414[/snapback]

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these came up first

133 O2 Sensor B1 S1

135 O2 Heater Circut B1 S1

141 O2 Heater Circut B1 S2

155 O2 Heater Circut B2 S1 came up twice.

cleared it to, and let it run to see if i could catch just one. which i did

code 133

so replaced the O2 senseor Bank 1 Sensor 1

let it run afterwards to see if that fixed it. nope. those 4 codes came back up.

 

[Justshootme84]

The code for "Bank1" is just the "catalyst efficiency", which means the O2 sensor is reading too much unburned fuel entering the pre-cat and cat. The only way I've had any luck keeping one of these sensors from triggering a code is to replace all 3 at the same time. Due to the cost and trouble of replacing the O2 sensors, it is something that you can live with without affecting the engine performance too much. IF you detect a "rotten egg" or sulphur smell from the exhaust, it could also be a clogged or burned out cat.

 

[brylac]

The code for "Bank1" is just the "catalyst efficiency", which means the O2 sensor is reading too much unburned fuel entering the pre-cat and cat. The only way I've had any luck keeping one of these sensors from triggering a  code is to replace all 3 at the same time. Due to the cost and trouble of replacing the O2 sensors, it is something that you can live with without affecting the engine performance too much. IF you detect a "rotten egg" or sulphur smell from the exhaust, it could also be a clogged or burned out cat.

22434[/snapback]

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yup, i catch that sulfer smell once in a great while.

 

[Justshootme84]

Whatever year modle Bronco you have, I'll assume it's an 87-up since you get the check engine light. Regardless, it has two cats, one is called a pre-cat to the regular catalytic converter. The ceramic plates inside can get burned out or clogged with crud from the exhaust. A good performance mod is to replace the two-cat system with a single, high-flow, aftermarket catalytic converter from someone like Catco or one of the other exhaust comapnies. A burned out or clogged cat will give you that sluggish feel and poor performance. Look for one with a **** for the O2 sensors, if you have the later-model Bronco with an O2 sensor after the pre-cat.