James Shiba

On 4/24/2018 at 9:33 AM, grahamtrd said:

Hi

saw this on another thread for the same issue hope this helps

 

 

 

Just a potential FIX for you bashing your head against this particular wall,

The problem, a 2008 is220d, 110k miles, with embarrassing quantities of white smoke from exhaust that smells of diesel fuel.

My parents car has been smoking like a pig for the last few months,

Diagnosis....
Garage condemmed the DPF and replaced it..................Still smokes.
Garage says "just keep driving it, the smoke will soon stop"............It didn't
Garage says "er, drive it some more"...................Still smokes.
Garage yanks the injectors and send them off to be tested, by people who are not idiots..................non idiots send them back with the verdict, injectors are perfect...........................Still smokes.
Garage now say they are sure it is the turbo which will need replacing...................At which point I get involved and rescue the car.

No sign of misfire, compressions good, no play on the supposedly fragged turbo, no headgasket doom.

Not trusting the fifth injector, I unclipped the fuel line and plugged it by clipping another injector on it.

Went for a drive, white smoke gone! So confirming fifth injector misbehaviour.

Changed the fifth injector, a total git of a job............Smokes, Argh!

So it is the ECU telling the fifth injector to keep on squirting.

Techstream turns up from ebay, so plug it in.

The dpf pressure values are all over the shop, so tee in a magnehelic guage, which disagrees with the values from the software.

Wiggle wiring, AHA! Gotcha! Pressure values in the software change in sympathy.

So I remade the wiring from dpf sensor to the ECU and then got good values for the dpf sensor pressure.

The ECU "learns" whilst you drive, but the corrupt dpf pressure data had totally confused it. Unplug car battery for ten minutes, reconnect, ECU starts to relearn with good data. Relearn the window winders by driving them for a couple of seconds against their stops at each door switch.

AND THE SMOKE STOPPED! and mpg has gone up from 25mpg imp to 40+mpg imp.

The magnehelic gauge reads 5kPa (20 inches water gauge) when regeneration of the DPF now starts.


Good luck on what is a fantastic car.

Hi Graham - do you know which version Techstream you've got? I have a 2006 is220d which "issues"?

Thanks

Hi I have a constant EGR fault since having an injector seal replaced on my 06 IS220D. The EGR valve has been replaced and the DPS has been cleaned and my mechanic is stumped.

I had a callback from an independant Toyota/Lexus mechanic who said there was a known problem/recall with that error on my model and the software needs updating.

Having called Lexus, they know nothing about it and it's currenty booked in for a £150 diagnostic (I'm already £700 down!).

Can anybody shed any light on this?

Thanks

Hi, apparently the injectors weren't replaced - it was the seal, so I'm assuming that there was no programming needed.

It's with the garage again and they've cleaned out the (new) EGR valve and have ordered another just in case it's faulty.

Is there anything else that could cause the EGR warnings, if the unit has been replaced? It happened first, soon after the injectors seals were replaced.

Thanks again

Great, thank you...gives me something to go on!

3 hours ago, ColinBarber said:

Are you still getting P0400 errors or different ones?

If an injector was replaced, was the injector's compensation code programmed into the ECU?

Hi Colin - I've just been looking up programming of the injector code into the CPU - is this something that can ONLY be done at Lexus?

Thanks

Hi

The latest code i got was tge EGR (0400).

Interesting point about the ECU codes though. I doubt if they were added to the cpu. (Not a Lexus garage).

Thanks

Hi took my 2006 Is220d (138000m) into the garage with very low power in gears 1 and 2. (No warning lights)

One of the injectors needed replacing and the mechanic cleaned the EGR valve. I drove the car away and within 5 mins it went into limp home mode with EGR error codes (0400). I cleared the code and took the car back. At some point I also had DPF warning (acting below threshold(?)).

He replaced the valve completely and cleaned the DPF. 

This time the car had loads of power - apart from a slight "niggle" around 25mph (momentary loss of power). On the first journey of more than 5 minutes (most of my driving is motorway) the same EGR warning came on after about 40mins. It went into limp home mode and although I cleared the error the car is pretty un-drivable now. The power is all over the place.

Any ideas? 

Thanks