02 Problems

Auto · 11-18-2009, 03:32 AM

I got this trouble code on a 01 Tacoma with the 3.4 and 5 speed the code is for the 02 sensor on bank 1 sensor 1. I changed the sensor before the converter with a Denso exact fit 02 sensor. I used a scanner to clear the code and it was fine for a weeks. Then check engine light came back on for the same bank one sensor 1 O2 sensor. Why would this code keep coming back? I did check the wires and they are okay. The truck has 88,000 miles on it.

humanoid · 11-18-2009, 08:19 AM

Sometimes it may not be the O2 sensor. Are you running a K&N air filter or other oiled media type filter?

Auto · 11-18-2009, 08:48 AM

No the truck is all stock. So you think i should try to clean the MAF sensor.

Auto · 11-18-2009, 04:32 PM

I just cleaned the MAF it was pretty dirty thanks for the suggestion i can see that being a problem.

humanoid · 11-18-2009, 04:36 PM

Is the CEL still there? If so, just undo the negative battery terminal for a couple minutes and that should reset it. If the CEL comes back then you have other problems.

humanoid · 11-18-2009, 04:36 PM

BTW, how did you clean your MAF? Did you use an MAF cleaner? Hope you didn't use a Q-Tip to clean the wires, those things are very fragile and could be a costly mistake if you mess them up.

98tacoma27 · 11-18-2009, 04:38 PM

Check for an exhaust leak also.

MiikeyD · 11-18-2009, 04:49 PM

is that a p0168? i think thats what it is... i have that also.. says o2 sensor but it might be the cat.

11-18-2009, 03:32 AM	#1
Auto Member Joined: Nov 2009, #25281 Location: Delaware Gender: Male Posts: 47 01 TRD SR5 2001 Xtra Cab Manual 3.4 V6 None Yet Some Coming Soon	Oxygen Sensor Problems I got this trouble code on a 01 Tacoma with the 3.4 and 5 speed the code is for the 02 sensor on bank 1 sensor 1. I changed the sensor before the converter with a Denso exact fit 02 sensor. I used a scanner to clear the code and it was fine for a weeks. Then check engine light came back on for the same bank one sensor 1 O2 sensor. Why would this code keep coming back? I did check the wires and they are okay. The truck has 88,000 miles on it.

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11-18-2009, 08:48 AM	#3
Auto Member Joined: Nov 2009, #25281 Location: Delaware Gender: Male Posts: 47 01 TRD SR5 2001 Xtra Cab Manual 3.4 V6 None Yet Some Coming Soon	No the truck is all stock. So you think i should try to clean the MAF sensor.

11-18-2009, 04:32 PM	#4
Auto Member Joined: Nov 2009, #25281 Location: Delaware Gender: Male Posts: 47 01 TRD SR5 2001 Xtra Cab Manual 3.4 V6 None Yet Some Coming Soon	I just cleaned the MAF it was pretty dirty thanks for the suggestion i can see that being a problem.

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