emissions light

[MartinR]

just drove back from devon and the emissions light has come on

have just had the k-tech ultra exhaust system and cat fitted. i put the code reader on and it says

generic fault p0420 catalyst system efficiency below threshold bank 1???

any ideas:S

 

[JackJack]

Possibly a lambda sensor

 

[MartinR]

Possibly a lambda sensor

just had brand new ones pre cat and after cat

 

[dan_1987]

Yeah upstream lambda sensor.

 

[dan_1987]

just had brand new ones pre cat and after cat

strange sure that's the upstream sensor

 

[JackJack]

highly unlikly but sensor could be faulty
or fitted incorrectly

 

[MicKPM]

P0420 relates to Ho2-2 so that's the Upstream/Post Cat Lamda sensor - First things first; check the wiring and the multiplug for corrosion or signs of damage especially if its recently been distrubed.

 

[MartinR]

highly unlikly but sensor could be faulty
or fitted incorrectly

how can you fit them incorrectly they only screw in and the wire has stright forwad connection?

 

[dan_1987]

P0420 relates to Ho2-2 so that's the Upstream/Post Cat Lamda sensor - First things first; check the wiring and the multiplug for corrosion or signs of damage especially if its recently been distrubed.

I thort that bank 1 sensor was the one before the cat?

 

[MicKPM]

The Ho2 sensors are labelled "Ho2-1" (Pre CAT) and "Ho2-2" (Post CAT) and both are "Bank 1"... I *believe* the "Bank X" description allows for generic EODB codes to distiguish between engines with more than one cylinder head.

 

[dan_1987]

Ah I see mate so the h2o-1 is the one before the cat and h2o-2 is the one after. Makes sense now!

 

[JackJack]

how can you fit them incorrectly they only screw in and the wire has stright forwad connection?

Im not implying anyone has done a bad job or anything but you'd be surprised what some people can do

sorry for trying to help

 

[MartinR]

Im not implying anyone has done a bad job or anything but you'd be surprised what some people can do

sorry for trying to help

lol i know your trying to help and thanks.

 

[JackJack]

no worrys mate
sorry that was a bit arsey long difficult day fixing s*it others have screwed up :dapprove: