Faulty O2 sensor, which one?

look:

i had the same problem:

the new lambda sensor:

It must first disconnect the battery, then unclip the lambda sensor

old and new:

and when the engine start, all was ok.
After replacing the faulty sensor, the engine light go off automatically ( I only disconnect the battery at the beginning)

if you can get it plugged in to computer it will tell you bank one or bank two o2 sensor .......bank one is normally the sensor b4 the cat then bank two is after the cat though some japenese cars do reverse this but i not come across this on any suzuki as yet......hope this helps

Both senors will be bank one as it is a inline 4 cylinder engine, bank 2 sensors are only used on VEE engines and it will be bank one sensor one or bank one sensor two Codes. sensor one is in the manifold sensor two is in or behind that cat it's most likely the sensor in the manifold because that's the one which take the most extreme changes in temp and the heater part always brakes down because of this and the engine ECU detects the circuit go open circuit and brings the light on.

Thanks everyone, I have discovered that I cannot get the the engine warning light to flash the error code by inserting a wire into the 6pin plug under the glove box because I have a factory fitted engine immobilizer. (correct me if I am wrong anyone). Using the service manual I have checked the resistance of the heater circuit on the sensor which is not quite right. I am going to bite the bullet and buy a new sensor.

Try this guy - www.carpartsexpress.co.uk

Thanks for the tip but I ordered from www.sparkplugs.co.uk 15 mins before your post.

I was able to match the exact part number. Quite cheap too.