Fault codes 2004 182

[Drew_182]

So just got my car back from swr this morn after getting my timing + aux + dephaser and thought ad check out what my fault codes are, threw up the following usin the u480 memoscan

1. N/A
2. P0136 - O2 sensor circuit malfunction (bank 1 sensor 2)
3. P0420 - cat efficiency below threshold (bank 1)

car has a decat-cat back on it (with o2 sensor plugged in and threaded into decat) iam assuming the 3rd code is due to high flow and non-existence of cat but its the second code iam unsure about. That just meaning the O2 sensor has had it?

cheers for any help!

​drew

 

[Drew_182]

So cleared the fault codes yesterday was fine all yesterday, this morn light come back on. Plugged the reader in and the fault code comes up n/a

anyone any idea? #stumped :/

 

[MicKPM]

They're both due to the decat mate

 

[Drew_182]

Yeah a cleared them n just putting cat on. Still throwing on engine light, with code saying n/a

Other two codes haven't come back, still getting one saying n/a

au recently fitted Mintex discs n pads with the abs ring and been reading on here that the abs ring CAN cause problems with abs, possible this as the code reader I have is a cheaply effort an dont think it does abs and srs

 

[matt911]

I have this P0420 Catalyst System Efficiency Below Threshold (Bank 1)

However my car is not decatted. Is this just a faulty sensor? My car runs fine too.

 

[Drew_182]

Well cats on, all codes cleared, idling to let gum cure, hopefully that's it all sorted