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Full cat exhaust and i keep throwing o2 bank 1 sensor 2. I…

Full cat exhaust and...

Full cat exhaust and i keep throwing o2 bank 1 sensor 2

Mechanic's Assistant: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?

I wasnt sure if a full cat exhaust had an o2 sensor on it

Mechanic's Assistant: What is the model/year of your Mazda?

2013 mazdaspeed 3

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

I bought it that way and the previous owners said it trips the code because it doesnt have that sensor

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

When i accelerate from 1-3rd gear its smooth, but once i drop into 4th i get lag or jolting thats only if i gun it if i accelerat without gunning then it wont happen

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Answered in 58 minutes by:
1/17/2018
roybelding
roybelding, ASE Master Tech
Category: Mazda
Satisfied Customers: 7,428
Experience: 40 years experience ASE master tech
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

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Customer reply replied 4 months ago
K
Customer reply replied 4 months ago
I'm fine with chat

ok

the sensor 2 has only one job, it monitors the cat converter. thats why the pcm is coding because it is looking for a reading.

it will not affect the running if the motor.

have you had the basics checked on the motor?? plugs, filters??

Roy

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Customer reply replied 4 months ago
I had a mechanic do it but Idk how through of a job was done

ask him for the results of what he did??

was there any other codes???

you have a performance exhaust installed but did you also have anything done to the intake system??

Roy

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Customer reply replied 4 months ago
Ram intake, full cat exhaust, high pressure fule internals

ok, good

any performance camshaft??

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Customer reply replied 4 months ago
No

ok, it is great you made the engine breathe. that a good enhancement.

the fact that you added high pressure fuel would require internal upgrades. you would need some engine timing changes as well as better cam duration/

do you know if they did any internal upgrsdes??

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Customer reply replied 4 months ago
Would it be possible the high pressure fuel internals is outputting to much for the current set up

thats where I was going. you need the internals to complement the add ons you have

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Customer reply replied 4 months ago
What next steps would u suggest
Customer reply replied 4 months ago
Cause it climbs smooth unless I go full pedal to the metal

I would have the fuel filter and pressure checked.

see if anyone can check the timing for you. you have a timing chain and would need to be checked for slack.

also, have the compression checked.

Roy

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Please take a moment and rate my service 3 stars or better. that is the only way the site will pay me for my efforts.

Roy

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do you have any other questions??

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any update

roybelding
roybelding, ASE Master Tech
Category: Mazda
Satisfied Customers: 7,428
Experience: 40 years experience ASE master tech
Verified
roybelding and 87 other Mazda Specialists are ready to help you
Ask your own question now

thank you

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roybelding
roybelding
roybelding, ASE Master Tech
Category: Mazda
Satisfied Customers: 7,428
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