code p0135 problem

4113 Views 8 Replies 2 Participants Last post by florinel76, Oct 6, 2008

florinel76

Discussion Starter · Sep 30, 2008

Hi i have a 97 mx6 2.5 V6 and i have this error code P0135 coming up. I have checked it with the scanner and it says it's the oxygen sensor 1 in bank 1 (and that is the one closer to the radiator. Both of my upstream sensors have 3 in line wires ... i have replaced with about 3 so far and once the engine warms up the code is coming up.

i would like to know what other problem might be besides the oxygen sensor itself ? is it possible to be a short somewhere in the harness ? or is there a fuse that might be blown that i don't know about or what ?

i can't pass the smog and this is frustrating as it is my only transportation ...

Please if anybody knows more about this problem let me know ... i did some search on the forum but there are only couple threads and are not quite similar to what i have.

thanks

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NickR

· #2 · Sep 30, 2008

I'm not 100% sure on this, but I think that bank one is the bank which has cylinder #1, which in the case of the MX6 V6 means the bank closest to the firewall. So sensor 1, bank 1, means the one on the rear downpipe, next to the firewall.

It wasn't clear from your post. Did you just replace the front sensor? If so, I think that's the problem: you replaced the wrong one. Hope you didn't throw the old one away.

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florinel76

Discussion Starter · #3 · Sep 30, 2008

you know what .. i will give it a try ... i have one for the back too .. for the one next to the firewall ... so i will see what is going on ... thanks though .. hope it will work this way

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florinel76

Discussion Starter · #4 · Oct 4, 2008

Thanks NICK ... it is 100 % now sure that for mx6 1997 the Bank 1 Sensor 1 and the code P0135 the oxygen sensor with the problem is the one by the FIREWALL for the V6 engines 2.5 .
so the oxygen sensor for the front the one by the RADIATOR is Bank 2 Sensor 1 ... i tested it myself ...

Thanks for the input it really helped.

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NickR

· #5 · Oct 4, 2008

Glad to hear you fixed it!

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florinel76

Discussion Starter · #6 · Oct 4, 2008

ok .. while im at it ... i had another error code in the same time but i wanted to finish first with one .... so i get this code p1195 ... i have tried to search but here there are not many info and there was one with pics but are very dificult to understand them ... so ... i would like to know what are the causes for a p1195 and where should i look into to try and fix it ... ???

it might be tha MAP sensor but i don't have soem schematics where is located ...

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NickR

· #7 · Oct 5, 2008 (Edited)

P1195 is "EGR boost sensor circuit". See post #6 here: OBD-1 codes and OBD-2 codes - ProbeTalk.com Forums

The EGR boost sensor, and boost sensor solenoid, are attached to the air filter box. I don't understand them. These posts may help:
To All The People Having Issues With The P1195 & P0300 - Mazda 626 Forums
Code 1195 (1997 Mazda 626 Lx) - Mazda 626 Forums
P1195 Trouble Code Mazda 626 V6 '97 - Mazda 626 Forums
Mazda EGR Flow: Low or Excessive?
Good luck!

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florinel76

Discussion Starter · #8 · Oct 5, 2008

Thanks again Nick ... when i will be done i will give more details about how i did it ... if i will be able to fix it.

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florinel76

Discussion Starter · #9 · Oct 6, 2008

Ok .. it appears that i didn't have any problems with the boost sensor or anything with the egr ... as i read in one of the links that Nick gave me it seems that i must have swap the plugs for the 2 sensor that make the connection between the egr and the boost ( map ) sensor when i replaced the valve gaskets so when i put everything back i swap the plugs ( in this particular case the plugs are the same as both sensors are the same) ... thus the P1195 code... once i tried and swap them back .. i cleared the codes and i have drove the car today and no codes came back anymore ....

now I'm happy ...

)) ... i will pass the smog check.

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