The EML came on, weirdly the day after passing the MOT, but my black 2004 best mate which I have owned for over 10 years, got through the emissions test and just about according to the tester. Maybe he knew something I didn't.
I have a little Aldi scanner which told me it was a P0155 fault. A little ferreting around this wonderfully informative forum the revealed it was bank two sensor one and the Denso replacement part was DOX-0204.
Having been quoted around £300 to replace it by Toyota so I thought I would have a go myself.
The best price was from https://www.sparkplugs.co.uk/denso-lambda-sensor-dox-0204 £67 according to the forum members. Including delivery (£4.11) using promo code THANK-YOU-5 to get (obviously) 5% off. it came to £67.27 and the parcel arrived two days later.
This have a go attitude was firstly from a cost saving perspective, secondly I would have to wait six weeks to get MrT do do the job and pay nearly £300 for their services and thirdly (the absolute decider) was the sensor was looking straight at me attached to the left hand side of the manifold. I needed a slotted 22mm socket with a suitable long bar attached to it for a lot of leverage which I borrowed from a mate although you can get them for around a tenner.
Do the job on a cold engine or hot engine? I went for hot, reasoning that exerything expands with heat and therefore it should be easier to remove.
It seems I may have been probably right in my assumption as it unscrewed after a couple of nudges back and two, but I didn't realise how much heat transfer took place from engine to socket. I do now.
I fitted the replacement (44Nm torque) and then I uncoupled the battery for 10 minutes as recommended to clear/reset the ECU and on start up the light was gone. I'm no expert but the idle seemed smoother and quieter, or was I imagining that?
Job done in under 20 minutes (saving nearly £233), by complete amateur, novice, non-professional me and it was all down to the information available on MR2Roc.
That's the spirit.
Well played.
Well done. If there's a 'Next time' do a bit more web-ferreting or post asking for a cheaper source.
There could be a next time Gaz as the sensor on the opposite side of the manifold has never been replaced. I'll follow up your advice if it dies. Is it the same sensor?
Quote from: luggsonofmyll on September 10, 2024, 11:46There could be a next time Gaz as the sensor on the opposite side of the manifold has never been replaced. I'll follow up your advice if it dies. Is it the same sensor?
The sensors are all the same, it's just the cable length that changes. Denso do a Universal Dox 0209 (I think) that has a long cable, & you cut off an old sensor plug, & crimp onto new sensor cable.
Or use the web & look for any Toyota fit 4-wire sensor with a screw fitting. Sometimes another model is listed much cheaper than for the MR2.
Similar to OP, I had the same fault a week after a service & MOT, again weird. I booked my 06 MR2 the same local garage for a fix next week. But, the OP inspired me to try DIY fix, what could go wrong?
So far all good. I bought the same part from Sparkplugs, bought a 22mm socket from Amz, old part came out easily enough and took about 20 mins.
SO, thanks to luggsonofmyll.
If it can help anyone local to me, I live in Reading and have an OBD reader & socket.