I get these error codes in my decated WRX MY01. After reset, the CEL turns on again and remains fixed after few km when i was driving in a motorway in high speed. According list of codes these codes means:

P1312: "Exhaust gas temperature circuit malfunction"
P0546: "Exhaust gas temperature sensor circuit high input"

I´ve read in Nasioc forums that P0546 is typical when is fited an decatted uppipe and it have not solution but make a circuit to fix CEL. I´ve recently blowed up my car and motor is absolutly new (only 2000 Km) and these codes do not seem the classics of decated exhausts. Wath's is your opinion about this. Should i be worried or these codes are really caused by decat exhaust. (naturraly i don't want new "surprises"

 

Either relocate the EGT to the downpipe; or with a few minor modifications & a resistor you can fool the system into believing its all ok

 

These means that these codes are not important?

 

They are in response to the EGT getting hotter tahn it should as the cats have been removed, though some people wouldn't want the CEL illuminated.

Customer's choice though easy to remedy..........

 

Thanks