TylerVE

Hey guys I'm new to the forum but have been lurking around for awhile. I recently purchased a 2000 Civic Si and after about a week of driving it the cel came on and the code was p0133 Oxygen Sensor Circuit Slow Response (Bank1, Sensor1) Both o2 sensors have recently been replaced, and I think it would be a wasted of money to go and buy another new one without seeing if its another problem. I was wondering what I should Troubleshoot, I have searched the forum and googled it and really am still in need of help. Any help would be greatly appreciated! Thanks!

Humphrizzle

google search:

http://www.obd-codes.com/p0133

TylerVE

Yeah I already looked at that but I wanted some advice from some honda guys about some steps to go about to see what the other causes could be like something in the wiring

92lxsleeper

you should have your question in the title so people who actually do know will come in. just a "please help" will tend to turn people away. just a thought.

TylerVE

Thanks for the advice will change

Humphrizzle

exhaust leak.

TylerVE

Yeah I saw that it could be an exhaust leak when I googled it, I was wondering what other kind of things i could troubleshoot

Former User

If there's no exhaust leak, replacing the primary O2 sensor should fix the problem.

TylerVE

The sensor has just been replaced with in the last 2000 miles, Thats why it is weird that it is going off, Is there anyway to check the wiring between the o2 and the ecu? Thanks for the help so far everyone

Former User

TylerVE

I saw when scanning through the manual earlier today, although I don't have the tools to do this, Thanks for everyone's help tho

Former User

You can inspect connector C123/C145 and resistance of the O2 wires that run through it.

You can also check for an exhaust leak.

92civlude

Some brands of fuel and/or fuel additive packages may create deposits at the fuel injector tips. This build-up may cause slight air/fuel deviations between each cylinder. Build-up of deposits, when coupled with very specific driving conditions, may cause the MIL to come on and the PCM to store DTC P0133.

motegicivic

check the wiring to the sensor, check the molex connector itself.

By the way what brand did you use?

and you are sure you have the right part number?

Also, did you reset the computer, did it come back?

does the car have the stock engine?

billsee1982

Wondering if you found the problem or if you were still having the problem?

TVE

It still pops on every now and then I usually turn it off and it stays off for a month or two, I also just brought my car to emissions in IL and passed,

billsee1982

so it comes on randomly?

TVE

Now that code doesn't come back on anymore and the p0135 comes on so I went out and bought and o2 sensor from autozone reset the code and the cel comes on almost right after I reset the code with the obd2 scanner and the live data says its running so rich that it pegged the volts at the meter at 1.275 I'm really not sure what to check

syrtuning

what i would do if i were u.. ill convert my obd2 to obd1 get a chipped p28 and a wide band and a dyno tune if its possible concedering that buying to oem o2 sensors its not cheap

Former User

Check whether 7.5A fuse 15 is blown and whether voltage from fuse 15 reaches the O2 sensor plug.

TVE

Thanks guys will try those things, reguardless of that today I took it to the local strip with some friends and ran a 15 flat in it, I was shocked, stock b16 i/h/e with mounts and p/s delete wasnt expecting that at all hopefully going to get an ecu soon to see what it'll do with a good tune and 2 step. Thanks for all your help