Hi guy's I am having a issue with a Evo X and I wonder if any of you can help.

The car is a Evo X sst 300 the car was stock and it was throwing codes P1870 and P1871 regularly.

I tuned the car and fitted a 3 port,test pipe,TBE and panel air filter and now the car throws P1871 only but not as regularly as it did before.

I have tuned many of the same cars and used the same rom on them and tuned it to each car but I have never had this issue before, there is no set time or condition for the cel light to come on it is very random.

 

Is it only throwing the code when you flash or is it throwing the code when you are driving?

 

It is when the car is driving.

 

Anyone have any more info ?

 

Does anyone know what the aps stands for with code p1871 maybe that woyld help determine the problem i looked up the code and it says aps system abnormal

 

Damn this thread didn't get very far.....anyone ever figure this out Im having the same problem? Except only P1871, and car sounds ****ty/clunky/exhaust leakish