so my cats were messed up a few months ago and i had my mechanic gut them out and weld them back in place, everything has been running great since then, now on the other day i went over a big speed bump and heard a scraping noise and ever since i hear this puttering sound from around the cats, i went back to my mechanic and he said he fixed it but as soon as i left i heard it again
now i haven't gone back to him yet because he was closing when i picked my car up but just now the cel came on and ran the code p0136 which says:

What does that mean?

Essentially the same as P0137, a P0136 code refers to the second oxygen sensor
on Bank 1. The O2 oxygen sensor produces a voltage between .1 mV and .9 mV. The ECM monitors O2 sensor voltage and determines if exhaust is lean or rich. O2 sensor voltage is high when exhaust is rich and low when exhaust is lean. The ECM monitors this voltage and increases or decreases fuel injector pulse width according to engine fuel/air ratio. If the ECM detects low HO2Sensor voltage for an extended period, it will set P0136 Conditions required to set: HO2 sensor voltage is low for longer than 2 minutes (minutes depend on model of vehicle. Could be up to 4 minutes)

Symptoms

There may be no visible symptoms to the driver. Poor fuel mileage, possible misfire, depending on O2 sensor position when sticking.
Causes

A code P0136 may mean that one or more of the following has happened:

* Faulty O2 sensor leak in exhaust close to O2 sensor
* Short to voltage on O2 signal circuit
* Open in circuit resistance caused by corrosion in connector

Possible Solutions

* Replace the second oxygen sensor on bank 1
* Repair open or short in signal circuit
* Clean corrosion from connector



my question is do i go back to my mechanic and have him figure this out or are there some quick solutions i can do on my own? idk if i should replace the 02 sensors on the drivers side (i believe that's bank one since cylinder 1 is on that side) or what to do

 

I would get some Mil Eliminators & clear the codes first....

 

is that gona have anything to do with the noise though? i know itll get rid of my cel but im more worried about this noise

 

got the eliminators, codes haven't come back yet
and i listened under the car a lil closer and it sounded like an exhaust leak so i brought it to my mechanic and he welded it up, all is well again

well besides the radiator leak, anyone know the best radiator for my car? im looking at the on mishimoto americanmuscle

 

cyl 1 is on your drivers side?

 

i believe so why is it not?

 

No. Bank 1 is passenger side. Cylinders 1-4 are passenger, 5-8 drivers.