P0133 code

[musiclover2000]

My friends car is

Topic

[musiclover2000]

Forgot to mention it has been on for a week went away sunday came back tuesday or monday.

[Trcustoms719]

The exhaust leak would have to be before the sensor and be pretty bad.
Is the car louder then normal?
Do you have a scanner that does live data?

[musiclover2000]

Thanks for the reply

The car runs fine other then the extra fuel being used. I don’t have a scanner that reads live data

[djdevon3]

Checked the MAF? Sometimes those O2 sensors and MAF are connected at the hip like siamese twins. One will get faulty and blame the other. I guess that’s more like brothers than twins but you get the picture. More than likely it’s just a bad O2 sensor but you have to do some back probing on the sensor and find out why. Gather evidence. If you don’t have a multimeter yet get one. They are worth it. You can do most diagnostics with a multimeter. Won’t be as easy or as efficient as a live data scan tool but much cheaper. If you can afford to get a scan tool with live data features do it.

[dreamer2355]

You will need a wiring diagram but you can check the readings of the o2 sensor with a DVOM. However, DVOM’s are a little too slow to update live sensor voltage values thus may give a false sense of reading.

You need to be looking for voltage fluctuations between 0.2 and 0.8v once the vehicle is in closed loop. If you see a steady low reading of under 0.4 volts, the ECM ‘thinks’ the vehicle is running lean. If thats the case, raise the RPM to around 2000 RPM and check readings. You can also use propane to use as a fuel to see if the o2 sensor voltage rises.

Hope this helps.

[musiclover2000]

I’ve gathered the evidence and it’s pointing to a exhaust leak. I compared my car with my friends hyundai. Stuck my hand over my grand am’s muffler and had a very hard time keeping it there from the pressure and no noise. The hyundai it was effortless holding my hand over it and when I did i heard a loud hissing sound. Stuck a shirt in the muffler and traced the noise some where by the exhaust manifold or possibly that gasket where the tail pipe begins.

This may sound kind of silly but could I use smoke bombs the kind from july 4 or have someone smoke a cigar and blow the smoke up the exhaust to locate the leak? Any ideas will be appreciated.

Thank you for all the help I really appreciate it

[djdevon3]

Not sure if that would work. You’d need pressure to push the smoke through the catalytic converter.

[EricTheCarGuy]

I think I answered an email on this today. I think I recommended that you do that exhaust test you mentioned with a friend and listen and feel for a leak.

[musiclover2000]

The leak is coming from the flex pipe on that woven metal thing. I’ll have to find a torch for removing those rusty bolts.

Thank you for all the help

[musiclover2000]

This part is from napa for about $40.00 Could I have a shop cut the old piece out and weld or clamp this in place instead of buying the whole pipe?

Thank you

[Trcustoms719]

Quoted From musiclover2000:

This part is from napa for about $40.00 Could I have a shop cut the old piece out and weld or clamp this in place instead of buying the whole pipe?

Thank you

Yeah, I don’t see why not.

[EricTheCarGuy]

Yea if they can do that it would save you some money.

[musiclover2000]

Thanks. I’m defiantly going to give this a try

[pcmdjason]

If you do replace the O2 sensor I’d go with a Denso over a Bosch if you have a choice. Denso’s seem to be faster acting. Bosch sensors tend to move too slow for asian cars and some people get codes with new Bosch sensors.

As someone once told me, don’t mix rice with kraut.

EDIT: Seriously? The word k/r/a/u/t is censored?

[djdevon3]

The word sensors on this site really need to go.

[Author]

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