I took my truck up to Oreilly's and they pulled my code and cleared it. Is said slow o2 circuit so I am assuming I have a bad o2 sensor. The truck has 103,000 miles on it.

 

What was the actual code? I think this is the common P0133 / P0130 code, but, I am not that knowledgeable on these CEL issues.

 

I never saw an actual number. The read out just said slow o2 sensor circuit.

 

I'd bet money the code was P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
......and yes, you need a new front O2 sensor (about $90 from URD).

 

what's urd? Is that $90 for an oem os that aftermarket? Also is there a write up some where on how to replace it?

 

1. Under Dog Racing
2. OEM
3. It so simple anybody could do it--really--unbolt O2 sensor, disconnect connector, connect new O2 and bolt up.
4. 100k--time to replace O2 sensor for sure.

 

URD = http://www.urdusa.com/product_info.p...s_id=430006000

Writeup:
http://www.ultimateyota.com/index.ph...26&topic=305.0

 

I reccoemnd go with OEM not meaning a toyota one but when you go to the autoparts they usually have a vehicle specific and a universal one. Get the vehicle specific. No offense but I kinda wonder why when people get a code from a computer and it is saying O2 sensor, they question what the problem is!?

 

Ok one more question Is there any way to tell witch sensor is bad or should I just do them both since I am just over 100k?

 

Wanna talk about O2 sensors listen to this. I recently completed a trip of 1500 miles. About halfway through the trip the Check Engine light came on, hmm I thought. The vsc light was also on but I didn't notice because I had the vsc and abs turend off at the time. Anyhow I got home a took it to the shop. My mechanic said they had a Lexus in last week that had the same issue. I was like what issue, he replied the O2 sensor trips the code, and the check engine light comes on a result. Huh I thought. He said they were a bit priciey for them to install them and recommended I do it. The only problem is I'm not sure which one it is.

Aaron

 

99 bucks a piece for mine from urd and 18 bucks to ship it. thats a pricey ordeal.

 

did u price from a local parts store?

Scanner should tell you which sensor it is too.

 

Guys, the OBD code will tell you which one to replace.

bank1, sensor1 = before cat
bank1, sensor2 = after cat

 

Ok engine light on again and tripped out VSC so I will placing a order with Toyotapartsales. P0420 was the code left bank running lean so said the reader.


Aaron

 

P0420, me and him are old buddies.

That's the cat code:
P0420 Catalyst System Efficiency Below Threshold Bank 1

 

So what to do with the lil bastard?

Aaron

 

Well a p0420 is the ECU telling you the cat or cat's aren't doing a good job of scubing the exhaust of bad stuff. The fix is usually a new cat or 2 (expensive I know) or a cheater way is this: http://www.urdusa.com/product_info.p..._id=1230100014

 

Hmmm
Catalytic converter, 4-runner, 6 cylinder, rear 01-02 $823.24 from toyota part sales. ! or $60 from urd for the bypass thingy. Now the responsible thing would be to replace the cat. I will have to use the pro con method to determine what is the best fit. Or $25+ $35 core on ebay. Or a couple ther cat options on ebay too, I dunoo what should one do in this situation?

Aaron

 

Any chance you're still under the federal emissions warranty? I think there are some other possibilities too, like maybe the rear O2 sensor being bad but you'll have to search that.

 

Umm federal warranty? At 158k not likely, I have a fancy volt meter so it might not be hard to tell if the rear sens. is bad. I know thats the cheaper one of the two. I would like to be responsible and keep my emissions low as I can.

Aaron