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Discussion Starter #1
Hi, we have a 2015 Trax Lt turbocharged. We have replaced, both o2 sensors, pvc module, knock sensor, mass air flow sensor, air filter, spark plugs, valve cover and gasket...car still running rough...any ideas what else it could be?
 

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Do you have a code?
 

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When changed the spark plugs did you check the coil for corrosion or bad contactors ?



 

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Discussion Starter #4
There were a bunch of codes, addressed all those first...no corrosion...did get some oil blow back which made us have to replace plugs, clean all that out and replace valve gasket
 

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Any codes now?
 

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Discussion Starter #6
Yes, the same ones of what we replaced
Here's a list
P0131
B2aaa
P0171
P0420
P0496
P1101
 

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You'd have no cruise with all those codes. B2AAA is a code that is sometimes displayed by some scanners or code readers when that particular scanner or code reader is programmed with an OBD II communication protocol that is incompatible with the OBD communication protocol in use. So lets disregard that one. That said all the other codes are good codes for the 2015 Trax and all point to a plugged catalytic converter or a collapse in the exhaust somewhere. Make sure you didn't back into a curb and bend the tail pipe or hit a rock and crushed the exhaust along it's length. Have the CAT checked to make sure it isn't plugged or that it's innards haven't collapsed. Maybe disconnect the exhaust after the turbo to see if it runs better. On my 2016 Trax the resonator had come apart. I replaced it with a straight pipe.

 
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