Alphie

Thanks Paul, the expansion vessel is near minimum level so i'll get some pink coolant & check the inverter side flow as you suggest.

Hi, this warning light (red car outline with exclamation mark through it, bottom right of display) has come on along with others (VSC , brake warning & Catalytic converter) which have now cleared, it was a very hot day. The red car remains on & I have lost all hybrid function ie seemingly no hybrid assist or regen braking; no energy flow arrows; no air con etc. Im wondering if it's related to the inverter coolant system, & wanted to check the coolant header, which is described as being a separate tank from the main engine coolant expansion tank but I cannot find a separate tank. Does anyone know if there is a separate header or if not a cooling issue, what else could be causing this fault. Thanks, Chris

Yes, leisure batt under gearshift & aux 12V under drivers seat in my conversion. There is also a shrouded positive terminal under the bonnet for jump starting i think.

Just wondering if anyone can add anything needed to bring this thread up to date. I'm trying to diagnose a fault which brings up my EML when I put the engine under a bit of extra load particularly in hot weather. It also lacks power & the drive seems to stutter under high load. I have changed the bank 1 lambda, no change. I suspect the MAF sensor but following advice on a YouTube video, I want to make some live readings before i attempt to clean or replace it (location on the hybrid is a bit of a nightmare). In particular the video suggests reading the 'calculated load' figure, which as a percentage at full throttle, can be in the 90's. This is supposed to be the best indicator of a faulty or fouled MAF sensor, which would return a lower value eg 70%'s. So my question is, does the Icarsoft scanner display the live data for calculated load or can anyone recommend a scanner that will. Thanks

I have a tow bar on a 2003 hybrid fitted by Campers Scotland, I cant see any info on it sorry. I think a big consideration however is what weight the hybrid can tow. I only use it for a bike rack, im not sure the early hybrid drive train is suitable for heavy towing?

Hi Gary, simplest to point you to my post on this topic, for any help I can give.

Thanks again, Paul. I changed the bank 1 lambda sensor, no probs with new error codes or running issues. Unfortunately though, it hasn't stopped the EML coming on, so ill have to move on down the list of possible causes. I haven't been able to obtain the error code yet. The issue, i would say is clearly linked to ambient temperature because on a warm day, as soon as you put the engine under a bit more than normal load (maintaining speed going up an incline), the light is triggered. doesn't seem to happen on cooler days. Still doesn't seem to affect running/power & always resets on shutdown/start-up.

Good luck Mick, wish I had the compressors/facilities to do it my self. Point taken Richard, I just think, they do wear out, part of the MOT, no idea when they were last changed & its a good opportunity with the springs out. Downside is the extra cost of course.

Well I still haven't got around to changing them but have decided on these https://www.autojapspares.co.uk/toyota-alphard-heavy-duty-20-rear-coil-springs--rear-gas-shock-absorbers-35792-p.asp from Auto Jap Spares for when I do. They are heavy duty & so should recover the ride height I seem to have lost due to the extra weight of the campervan conversion.

Cool, thanks ill give it a go.

I've had mine for 5 years, about 120k miles on the clock, so far so good. love it - but it does feel like im living a bit on the edge! 🙂

Paul, thanks for your help - You were right the basic Foxwell OBD tool i used showed no error codes. The EML is only getting more frequent though so Im going to start with (your) bank 1 lambda sensor. I see they are available from AutoJap - My question now is, are they just plug & play or will I need someone to set it up/recode the management system? Cheers

Thanks Paul, that's useful & presumably means it using excess fuel in that condition. I've borrowed a basic OBD & will give it a try. Mine runs on LPG most of the time once started on petrol but I'll also check the exhaust when the light is on.

Its certainly possible to have a towbar fitted & I use a Pendle rack (permanently fitted bracket behind tow ball & two demountable bike support bars) fitted to mine

Does anyone know how to read the cause of the EML coming on. It seems to only do it on warm days & if I stop the engine & immediately restart it, it resets & stays off, makes me think the trigger may just be a momentary fault but that the light latches on until the engine is powered off. It was an infrequent event but now happens on most longish journeys. There is no apparent loss of power or anything else noticeable. If you google it - it can mean a number of things. Just wondering if anyone else has experienced same & thereby work out which on the list of possibles I should try first. [I am thinking dirty mass airflow sensor] Thanks