O2 sensor codes and step 1 colder plugs
11-19-2003, 10:26 AM
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O2 sensor codes and step 1 colder plugs
I got a "check engine" light the other night....plugged the laptop up to the obdII and the codes were:
-O2 Sensor Circuit Error
-O2 Sensor Slow-Response
I cleared the codes and after driving for about 10min got the check light again....Even with the check light on, it still drives fine...I'm ordering a new front O2 sensor ($88) My question is about the rear O2 sensor...this would not need to be replaced right? I was under the impression that the rear O2 was pretty much useless and it would be a waste of money to replace it. (same with my Supra's rear O2)
Also, its about time to replace my plugs...right now I have the stock plugs and I was reading about the 1 step colder irridium plugs (~$90 for 6 made by ND/TRD)...is this the recommended plug for SC applications? or would stock do me just fine?? Does NGK make a 1-step colder plug (for only a few $'s each)??
If my O2 has been on its way out...I'm sure with a new one, I'll see a gas milage improvement and possibly an improvement in performance
Thanks in advance,
-O2 Sensor Circuit Error
-O2 Sensor Slow-Response
I cleared the codes and after driving for about 10min got the check light again....Even with the check light on, it still drives fine...I'm ordering a new front O2 sensor ($88) My question is about the rear O2 sensor...this would not need to be replaced right? I was under the impression that the rear O2 was pretty much useless and it would be a waste of money to replace it. (same with my Supra's rear O2)
Also, its about time to replace my plugs...right now I have the stock plugs and I was reading about the 1 step colder irridium plugs (~$90 for 6 made by ND/TRD)...is this the recommended plug for SC applications? or would stock do me just fine?? Does NGK make a 1-step colder plug (for only a few $'s each)??
If my O2 has been on its way out...I'm sure with a new one, I'll see a gas milage improvement and possibly an improvement in performance
Thanks in advance,
11-19-2003, 10:36 AM
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I very rarely have pinging problems....only occasionally holding a speed up a hill, the usual ping situation. But even then, it doesnt ping much.
Any idea how much of a difference 1 step colder to 2 step colder would make? Are there any drawbacks to the 2 step colder plugs?
Any idea how much of a difference 1 step colder to 2 step colder would make? Are there any drawbacks to the 2 step colder plugs?
11-19-2003, 10:37 AM
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Originally posted by <96 Runner>
How do you know the codes you pulled were not from the rear O2 sensor?
How do you know the codes you pulled were not from the rear O2 sensor?
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11-19-2003, 11:28 AM
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I just got the check engine light the other day. When I hooked up the OBDII it told me PO133 O2 sensor circuit slow response (bank 1 sensor 1.
I also have 96 v6 and I am going with a denso O2 sensor which is the same as the OEM. Your right about the rear O2 being useless. It only operates 10% of the time.
Later model years I beleive 99 and up would need to replace the air/fuel ratio at about $300. Theres two in the front and two in the back for those model years.
I also have 96 v6 and I am going with a denso O2 sensor which is the same as the OEM. Your right about the rear O2 being useless. It only operates 10% of the time.
Later model years I beleive 99 and up would need to replace the air/fuel ratio at about $300. Theres two in the front and two in the back for those model years.
11-19-2003, 11:34 AM
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Originally posted by <96 Runner>
What do you mean "replace the air/fuel ratio" ?
What do you mean "replace the air/fuel ratio" ?
Sorry if that isn't what exactly they are called, but I think it's close.
11-19-2003, 05:14 PM
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Originally posted by mark_simon
I just got the check engine light the other day. When I hooked up the OBDII it told me PO133 O2 sensor circuit slow response (bank 1 sensor 1.
I also have 96 v6 and I am going with a denso O2 sensor which is the same as the OEM. Your right about the rear O2 being useless. It only operates 10% of the time.
Later model years I beleive 99 and up would need to replace the air/fuel ratio at about $300. Theres two in the front and two in the back for those model years.
I just got the check engine light the other day. When I hooked up the OBDII it told me PO133 O2 sensor circuit slow response (bank 1 sensor 1.
I also have 96 v6 and I am going with a denso O2 sensor which is the same as the OEM. Your right about the rear O2 being useless. It only operates 10% of the time.
Later model years I beleive 99 and up would need to replace the air/fuel ratio at about $300. Theres two in the front and two in the back for those model years.
11-20-2003, 04:06 AM
#13
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Originally posted by mark_simon
I just got the check engine light the other day. When I hooked up the OBDII it told me PO133 O2 sensor circuit slow response (bank 1 sensor 1.
I also have 96 v6 and I am going with a denso O2 sensor which is the same as the OEM. Your right about the rear O2 being useless. It only operates 10% of the time.
Later model years I beleive 99 and up would need to replace the air/fuel ratio at about $300. Theres two in the front and two in the back for those model years.
I just got the check engine light the other day. When I hooked up the OBDII it told me PO133 O2 sensor circuit slow response (bank 1 sensor 1.
I also have 96 v6 and I am going with a denso O2 sensor which is the same as the OEM. Your right about the rear O2 being useless. It only operates 10% of the time.
Later model years I beleive 99 and up would need to replace the air/fuel ratio at about $300. Theres two in the front and two in the back for those model years.
The rear sensor rarely goes out because it gets much less exposure due to its placement downstream of the catalytic converter. It is only a corrector or modifier to the ECU where the front sensor is the actual workhorse of the EFI feedback system. This is also why it is replaced far more often that the rear.
As mentioned already, do make sure you get the correct part for your VIN# truck. You want to replace with the same sensor be it the O2 or Air/Fuel ratio type.
11-20-2003, 07:12 AM
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Originally posted by 96TRDsc
nice...you have a link for the denso O2 that fits the 4Runner?? cheaper than OEM? thanks
nice...you have a link for the denso O2 that fits the 4Runner?? cheaper than OEM? thanks
Denso Part number 234-4162
See what price you get on a Denso O2 sensor. I might be able to get you a better deal.
11-20-2003, 08:32 AM
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I just went through the same fiasco. Got a bank1 sensor 1 code, and the dealer gave me the wrong part. Toyota calls it the 'Air/Fuel Ratio Sensor', and wants $300+ for it. I got one at a j-yard off a 2001 for $45.
They shipped me a rear O2 sensor in the bag on accident, but I don't need it. If anyone wants to replace theirs, I don't need it, $20 shipped.
They shipped me a rear O2 sensor in the bag on accident, but I don't need it. If anyone wants to replace theirs, I don't need it, $20 shipped.
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