Engine Management Light and Warranty

@carpymick

Thanks for your reply.

Yep, think I'll try again from the top side  using an old MTB gear cable and WD40... it's bad enough changing the oil lying on my back on the driveway, so removing heat shields, rusted bolts, etc, doesn't appeal! 

Some Mini and BMW owners have pointed to the EGR valve causing these faults too, so hopefully the OBD scanner will confirm. I had the EGR recall carried out by Toyota in 2021 but not sure the extent of the replacement/repair. Just to confirm the faults showing are P0471 and P00BD but no loss of power yet. They will reset ok but have now come back on twice after reset.

If anyone else needs to know, the pipe and sensor are parts of 17191 in the attached diagram... attached to the exhaust manifold.  

Pictures attached of the sensor with and without electrical connector attached. Like Carpymick said... sensor is rear left behind the turbo intake and quite difficult to see! Deep 27mm socket required to remove. I'll take photos when cleaning over the next few days which hopefully will help others. 

Good luck, hope you get it sorted. Great pics someone will find that useful. Took me ages to find it although if you know anyone with autodata it would probably show it. I forgot to take pics when I did mine.

Good luck, TommyWooWoo ! Your pictures will be a great help to anyone needing to do this in the future. 

20 hours ago, TommyWooWoo said:

Pictures attached of the sensor with and without electrical connector attached. Like Carpymick said... sensor is rear left behind the turbo intake and quite difficult to see! Deep 27mm socket required to remove. I'll take photos when cleaning over the next few days which hopefully will help others. 

I meant front left of the turbo intake!

I cleaned the pipe this morning from the topside... brief method and pictures below. Thanks for the guidance all, it wasnt too bad of a job. 

Remove Battery negative connection.

Undo mass air flow sensor plug and cable guide.

Loosen jubilee clip on turbo intake pipe (air filter end) and remove air filter top housing and air filter.

Lever up the centre arch section of the turbo intake pipe metal C-clip (turbo intake end). The clip should lock in place in the raised position otherwise the pipe will not come off the turbo.

Unclip the 3 pipes from the turbo intake pipe carriers, 1 pipe top, 2 pipes bottom.

Unclip the flexi breather pipe going to cylinder head at cylinder head end. This is attached to a round plastic unit, PCV valve I think.

Remove turbo intake pipe with breather attached.

Exhaust sensor is now visible with a little neck craning at front of turbo inlet.

Unclip electrical plug from exhaust pressure sensor.

Unscrew sensor anti clockwise using a deep 27mm socket.

I sprayed in WD40 and this filled the pipe so I knew it was blocked. Alternatively, blow down the pipe with a piece of hose to see if clear.

I used MTB gear cables and gear cable outer to guide the cable in. Took me about an hour of back and forth, spraying wd40, several gear cables amd a cordless drill to get the pipe clear. When starting I could only get 125mm of cable in but in the end I measured 200mm of cable insertion before stopping, I assume against the banjo end.

I reassembled and noticed the breather pipe was split, not sure If I did this or its a symptom of the mass air flow fault. Either way I taped it up temporarily until I get a new pipe... £42 plus VAT from Toyota. Part number 12262-YV010.

All of that crud and WD40 is going to get blown into the DPF/EGR so probably best to get some heat into the engine afterwards.

Few points to note...

Make sure to cover the turbo inlet when working so nothing gets dropped or blown in.

Put the turbo intake pipe C-clip in raised position before installing.

Turbo intake pipe aligns with a small dowel on the turbo. 

Think thats it, just waiting to see if the fault reappears... !Removed! well hope not!

Excellent stuff and very good of you to post all the images to make it easier for the next person who suffers this fault. Definately worth chipping away at clearing pipe and spot on to go for a good run and burn the crap off. 

Im still having a few issues with mine, the scan tool Launch 123 Pro reports a ridiculous pressure for the DPF Differential sensor of minus 45psi which is actually impossible. Just bought a manometer to note actual pressures and a DPF differential pressure sensor to see what readings that gives.

Agreed ! Excellent stuff, and thanks for posting all the steps and images.

Hope you get the DPF Differential Pressure sorted, carpymick.

Just an update...

The car has now done 220 miles since cleaning and no warning light or OBD codes. The light returned after 20 miles or so the last 2 times it was reset before cleaning so I'd class this as a success!

Many thanks for the information and for posting this topic... you've saved me £'s compared to putting it into a garage. Cheers!

@carpymick

Did you get the DP sensor swapped out?

Checked mine using a Topdan scanner and it was showing a DP of 11mbar with distance since last regen of 750 miles.

That's encouraging about the warning light not coming on after 220 miles !

I used my OBD2 Scanner today - the only reading that seems to mention particulates is shown in the picture below. 

It was town driving for about 10 minutes, including idling at traffic lights and speeds of 0 -35 mph.

The reading of 17+ kPa was during a short burst of hard acceleration up a hill. I am hoping that the large variation indicates that it isn't blocked !

I guess this is the equivalent to 7 - 170 mbar. Hope this is of some help

.

Hi all,

I got my manometer and took a reading where all seemed fine. Low pressure was 0.6kpa and high was 0.62kpa rising to 3.2kpa low, 7.5kpa high at  at 3000rpm. Certainly nowhere near the figures Launch was giving me. I tried running car with DPF sensor disconnected and it immediately threw up the DPF Full on the dash board, so clearly working ok. Reconnected and left it at that. Been for a 40 mile drive and no codes appeared. Last Regen was reported as 90,000m (90km) ago so fairly recent. Fingers crossed the old car is sorted now.

Glad this thread has helped a few folk out including me.

Hello again !

My car has been running well since the turbo pipe was cleaned in January. However I'm now getting the message "DPF Full - See Owners Manual" again.

As I'm going on a trip with my caravan in just over a week, I will be able to run at a steady 60 for the required 30 minutes+, in 5th gear to keep the revs high enough to hopefully clear this.

The strange thing is that I am not getting any error codes when I connect my ODB2 scanner - should I be not be getting something showing up ?

I dont think this generates a code as MIL doesnt come on, just the info on the dash display. When I had this warning on mine it took a 50 mile drive at 60mph in 4th before the warning vanished. Since cleaning the exhaust pressure sensor pipe on mine I havnt had that warning come on again. The car did do a regen on its own as I could smell it and its in the history when using scanner. Sounds like it needs a good run. 

Mine does a lot of short journeys so I take it for a good drive every week if possible. Hopefully that will sort it out for you.

Thanks carpymick - that makes sense. Hopefully will be cleared after my journey next week !

Couldn't wait for the caravan trip, so I went on a trip from Glasgow to Port Glasgow and back along the M8, watching the DPF message and the exhaust temperature - the message stayed on and the temperature was hovering around the 300 deg mark - so I went back through the centre of Glasgow and onto the M77 to Kilmarnock, and happily the temperature shot up to 600, and eventually the light went out. Must have covered about 60 miles .. I hope it's burnt off enough carbon to last a while !

I can't help wondering what effect the DPF regeneration process has on emissions ... 

The modern emissions system is a bit of a disaster. My old Citroen 2.0 HDI used to regularly return 50mpg. Now my Toyota verso can barely manage 40 and I have to take it on extra drives for no good reason other than to keep DPF active. 

Its worth remembering that DPF wont regen if the service indicator is overdue. Glad to hear yours regenerated successfully. It does take a good run to get it going doesnt it.

That's surprising - Our old Verso (So old it was a Corolla Verso!) could get 50-55mpg fairly easily. My dad has a petrol one now and gets around 40mpg.

40mpg sounds about right... we do a mix of local and A road runs and average is 45mpg in our 1.6 diesel Verso, not great!

We had a 2010 2.0 diesel Verso before,  without a DPF. Wish id kept it to be honest as It was a much better engine and gave us 47mpg.

My confidence in this BMW 1.6 engine is limited. Already had a crankshaft pulley and aircon condenser in the last year, along with the recent blocked exhaust sensor pipe... just waiting to hear the dreaded timing chain rattle any day as its now on 67K!