Well after months of procrastinating, finally got around to swapping out my duff Lambda sensor. Helped by the fact the car was on a ramp last week and the mechanic loosened of the existing Lambda for me!
I fitted a universal lambda (Bosch LS615) which I picked up for around £50 off a Vauxhall parts web site!! The actual sensor is the same across a wide range of cars but what is different is the cable length and the connector. So with a little bit of extra work, you can save £40-50 this way. I double checked the part of the Bosch website so was happy that it was correct.
The Bosch kit comes with a wiring block that doesn't even need a screwdriver. The wiring is joined using special connectors which screw together clamping the ends of the wires. The only tools you really need is a wire cutter and a wire stripper, but I guess it could be done "Dad's way" with a sharp knife!
Yes, it was fun getting the wire back up the rear of the engine via numerous pipes, but I pre-empted that my tying a thin piece of string to the connector before I pulled it out. It would have been easier if the last time it was changed the cable was fed a different way, but it's almost impossible to get my hand/arm down the back to reroute it and I didn't want to drop it and have to start all over again.
Took the car out for a spin while hooked up to AlfaDiag and the sensor logging shows a completely different picture to the old one (See below). The old lambda stayed around the 0 volt mark with the odd "blip" to 1 volt max.
And no fault codes. It constantly showed P0130 and P0170 from the old NTK lambda, so that was well beyond the "sell-by date" and wasn't likely to pass the next MOT. The CO2 reading from the last MOT was very close to fail ... 0.1% off the max. It took them three goes to get it to that too! (They couldn't find anything else wrong so were determined not to fail it on a silly technicality like emissions, especially as it was so close to passing).
Remember Lambda's only last 40-60K miles ... and fit a Bosch .. NTKs and others aren't rated correctly and will just give fault codes all the time.
I took some pics but haven't downloaded them from the camera yet. I'll get this sorted soon and put them on my website as a how-to!