Hi there can anyone put me on to the right track for the following codes.

PD0135 O2 sensor Heater Circuit Malfunction(Bank1 Sensor1)

PD0030 HO2S Bankk 1,Sen 1 Heater Circuit

They are both present and obviously are related not sure what sensor it talks about. I Know there is a intake temp sensor,Lamda and Air Mass Meter but heater circuit??. Help lol thanks Matt. Oh i have cleared them both light out but a day or so later came back on tried a couple of times but keep comming back.

Did you try the search?

Search? where can i find it this is the code explanation from the diag tool.But not sure what sensor its talking about on the Vrs Mk1 Octavia?.Thanks Matt

http://briskoda.net/search/

There is a search bar on the top right of every forum page (just above where it says "Welcome matt159888)

However nothing comes up with those codes, personally i cant find any PD#### codes, may be worth loosing the D out of the code.

A quick google turns up:

www.obd-codes.com/p0135

Ross Tech (the people who designed VAG-COM / VCDS) are another useful source for info.

HTH.

Those are common generic reader codes and not VCDS so won't really be used here however search for the text and you'll find everything you need including how to fix it and the cost.

Seems like the first lambda sensor at fault here. Thanks everyone for the pointers. Looks time to fit a new one!. Thanks again great site Matt

Ok ok i give up anyone had this problem? Fitted new Lambda sensor and for 4 days all fine then wham back on arrrrh!!!!. If anyone knows the heater circuit then please please help before i go mad lol.thanks Matt

Did you change the right one?

Yeah code related to the upstream sensor pre cat. So changed that was ok but back on again. may be a wiring fault but need a clue where to check if any weak spots around?. thanks Matt

time to sell the car i reckon!!!