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2.2 D4D T180 Dcat - Eml P0093 Check Vsc - Nightmare


bkz187
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Hello all

newbie here requiring help from experienced members

first of all please let me apologise for such a depressing first post. I am member on S2K forum and recently bought my first 2007 Auris 2.2 D4D DCAT T180.

I bought it from a friend of mine who deals in main dealer part exchanges.

The vehicle was traded in by previous owner due to having an EML on. My mechanic was confident it would be injector or fuel pump related so we decided to take a chance. I have been online last 4 weeks digging for information.

The vehicle is a June 2007 model and is coming upto 100k miles. FSH from Toyota.

I have read the 57 page thread Charliefarlies Guide To The Toyota 2Ad Diesel Engine And Its Issues so I am aware my car may still qualify if the fault is covered.

So here's the problem:

Vehicle continuously has a Check Engine Light and also says Check VSC. When you first try to start the car it will turn for approx 6 secs before starting up; which is quite slow. It will briefly allow you to accelerate and allow you to drive. Black smoke can be seen from exhaust (even though DPF is fitted)

After 30 seconds "check engine" will flash and the car will go into "limp home mode".

The code returned is P0093 Fuel Leak Detected (Large Leak)

Injector values on the computer:

1) 0.16 mm

2) 0.31 mm

3) 0.00 mm

4) -0.47 mm

Mechanic checked it all over and found no leak whatsoever.

Steps taken so far:

1) Cleaned out the EGR valve. It was very very dirty and blocked. The inlet manifold was also very very dirty but impossible to clean in situ.

2) Ran full bottle of Forte Advanced Diesel Treatment

3) Changed Fuel Filter and Air Filter

4) Tested injector plug connectors

The above did not help

4) Spoke to major diesel specialist who recommended we change the SCV in the Fuel Pump before undertaking anything else. The new SCV was slightly longer (modified) and cost £115.

Vehicle still behaved the same. Check Engine / Check VSC / Limp Mode

Today I got lucky and took the car for a good 10 minute blast. Fuel pump must be ok??

However, noticed a lot of smoke from the exhaust. Turbo seems fine. Maybe just the DPF regen cycle?

Mechanic believes everything on the fuelling side is ok but cannot explain the P0093 code. However he believes the DPF could be partially blocked and the 5th injector could be perished causing fuel to leak into the exhaust and causing black smoke.

he believes the P0093 is a red herring and the real culprit is the DPF.

So sadly we are currently stumped. I have the option of handing over to my local dealer who wants £130 to diagnose the car before offering me any advice. They would not discuss any good will warranty until vehicle is diagnosed.

I can pass to a diesel specialist and pray they don't shaft me!

Any ideas?

Would the DPF throw a different CEL code? or can it be blocked and not give a code?

Check VSC is related to 5th injector right? What is this injector? any part number or price? easy to replace?

Would Toyota extended good will warranty cover this issue?

Anybody successfully resolved a P0093 code?

Thanks in advance!

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P0093 is "large fuel leak detected" and is often set by a faulty SCV allowing fuel pressure to drop between switching the engine off and restarting, when the new valve was fitted was the Engine ECU software updated to operate the valve correctly?

I have seen this code once before where all the modifications where done but it kept repeating, everything appeared fine on diagnosis but on recommendation from Toyota we removed the injectors and had them leak tested and whilst electronically fine two of the four leaked fuel when they where supposed to be closed, this was detected by the fuel pressure sensor as a fuel leak and P0093 was set, two new injectors fitted and no further fault.

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I would get them to check the 5th injector as this could be on the limit.

Also the difference between injector 2 and 4 seems a lot, trying to remember what the exact specs are, Devon can you shed some light?

Alex

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P0093 is "large fuel leak detected" and is often set by a faulty SCV allowing fuel pressure to drop between switching the engine off and restarting, when the new valve was fitted was the Engine ECU software updated to operate the valve correctly?

I have seen this code once before where all the modifications where done but it kept repeating, everything appeared fine on diagnosis but on recommendation from Toyota we removed the injectors and had them leak tested and whilst electronically fine two of the four leaked fuel when they where supposed to be closed, this was detected by the fuel pressure sensor as a fuel leak and P0093 was set, two new injectors fitted and no further fault.

Hi Devon

We fit the new valve and cleared the codes. But the P0093 returned. How would I go about updating the software?

The injectors have been marked tested previously, they sound fine and the car actually runs fine. So that's why we ruled out the injectors. However, that may be the next avenue. It will cost £75 to test all 4.

How do I test the 5th injector? Can it leak fuel causing a P0093?

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OK So I have spoke to the previous owner who says he had the injectors replaced not so long ago

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The injector compensations are within spec, software update will have to be at a Toyota dealer, who fitted the injectors? did they replace the injector seat seals? these can leak especially if they are doubled up, where the new injectors programmed into the cars ECU? as each injector has an ID number that must be written onto the cars ECU.

The 5th injector cannot set the p0093 fault code it is for injecting fuel into the DPNF during regens

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I only spoke to the previous owner briefly

all he said was "I had the injectors replaced" - i will ask him who fitted them and if the seals were replaced.

I spoke to Toyota, they say they can plug the car in and check for an update for £105 .. but they cannot specifically code the new SCV.

They also commented that they have never replaced a fuel pump or a SCV in a 2AD engine! Apparently they don't go wrong.

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Just a quick update

I have still been struggling on with this car

I took it to a diagnostic chap who put the Snap-on machine on it to reset the dash lights

P0093 was still on there

Also, within the VSC module there was a Engine Control Fault so we reset that too.

Started up and still turned for longer than normal but everything else seemed fine.

Took the car for a drive, and hey presto the CEL did not return. So I filled with Shell Nitro Diesel and took for a good run on the motorway. All gears fine, good power, nice turbo pull, no smoke.

After about 20 miles of mixed driving I was heading back and the dreaded Check Engine warning, CEL and Check VSC returned

All very strange. What would this behaviour normally suggest?

I have now managed to borrow a fuel pump off a mechanic from a 2010 Verso 2.2 D4D so will be fitting that to rule out my original fuel pump.

My suspicions are still pointing towards the injectors. I hear they are very expensive? because they cannot be refurbed?

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OK I fit the donor fuel pump but car refused to start - may need coding, or bad pump or simply the wrong pump

So I took out the injectors and had them tested - result came back : - no obvious issues, no leaks and no drop when running full pressure

Also had the original fuel pump tested - result came back : - No faults noted

OMG!!??

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Have you had the ECU updated as Lee suggested?

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A possibility would be to take off the inlet manifold and clean all of that out. Iv seen it before where there is almost no space left in the manifold for air to pass through and this caused the issues that you're describing.

The injector values are fine and if the egr valve has been replaced for a modified one (Toyota part), it should also have had the latest ecu update programmed to it.

Cleaning the inlet manifold would be a cheap option, although it does take a while.

Hope this helps

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I have cleaned out the EGR, not replaced it

I will be refitting the injectors and fuel pump, then resetting the lights again

will see if anything has changed..

If no good, then I will be giving it to the main dealer for software update/diagnostic :(

Sadly, I have not had much advice or guidance - and mechanics just don't want to know

will avoid cr@ppy built Toyotas in future

Audi all the way

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I have cleaned out the EGR, not replaced it

I will be refitting the injectors and fuel pump, then resetting the lights again

will see if anything has changed..

If no good, then I will be giving it to the main dealer for software update/diagnostic :(

Sadly, I have not had much advice or guidance - and mechanics just don't want to know

will avoid cr@ppy built Toyotas in future

Audi all the way

You bought a car with a known fault on it and now it's the cars fault? As you said in post #1 you took a chance.

And I've just ditched my Audi. They certainly aren't all they are made out to be. Customer service is rubbish even if it's a known fault that many people are experiencing. Toyota on the other hand have taken my car in out of warranty and are repairing it FOC whilst giving me a free car to use. Take the car to a main dealer and get it repaired. Swapping and changing second hand parts will never get you anywhere.

Sent from my iPhone using Toyota OC

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Jon35y is right,

If you bought it knowing you had to try and fix it, you ran the risk.

If anything, VAG cars can be more problematic that Toyotas by a long way. Their diesels engines have no end of problems!

Also you said you haven't cleaned out the inlet manifold in an earlier post so you ought to be doing that ...

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I can clean out the inlet and the dpf but can that be related to a P0093 fuel leak?

I bought the Toyota thinking it was Japanese.. it's clearly not! We have a RAV4 in the family with the 2,0 D-4D lump. The car has "Made in Japan" on the windscreen. Solid car.

Anyway, after speaking to many diesel specialists, they all loath the Toyota 2.2 engine. And many have commented that once they go wrong.. nobody wants to touch them.

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On the Audi comment.. best car ever made Audi A4 2001 - 2004 B6 TDI Quattro Sport :driving:

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