1.9 BXE diesel cut-out & not starting - Help please

[sef-75]

Hi there,

Can anyone help please- 2008 Passat 1.9 TDI BXE engine, the engine suddenly cut-out when driving, would not restart. No dash faults etc.

RAC tried banging on fuel tank for fuel pump issues, no problem.

RAC connected diagnostic, stating fault code P3007 for Camshaft sensor no signal. Recovered back as no garages open Easter Sunday. Fitted a FACET brand replacement today from Eurocarparts as open again after Bank Holiday.

Engine still won’t start, it just cranks but as soon as key is pressed in a an exclamation mark and the cruise control dial symbol appears in the red multi display in the middle of the dash between the dials. It is not the cruise control light that normally appears when in use. On one cranking attempt, a red oil can symbol also flashed up once, but the engine is full of oil to the dipstick mark and it didn’t appear again.

Any ideas, would appreciate any help as RAC won’t come out again as it is an existing fault now and can’t now get the car to a garage.

Thanks for reading and any advice.

[Crasher]

Ignore the oil pressure warning, the 3C shows an error when under prolonged cranking so it is a red herring. A cam position sensor G40 code no signal would not normally prevent the engine starting. The fuel pump may be new but can you hear it running?

[sef-75]

Hi,

Thanks for your reply and suggestion, I am not sure as I didn’t go under the car, but assume that the RAC man was satisfied when under the car. Is there any way of checking fuel presence at a hose or somewhere under the bonnet? There’s no hand primer which is on another diesel car.

Tried it again this evening and now in addition the display flashes up Parking Brake Failure, even though it works and can hear it going off and on, but also Emission Warning on the big red display, all the while still showing the Exclamation mark in the bottom left of the panel.

Is it all related and something electrical perhaps? The Emission message is very odd, the car doesn’t have a DPF.

Thanks again

[philipharmes]

When you turn on the ignition the tank pump should run for a few seconds, you should be able to hear that.

You could disconnect the pipe from the pump & check there is fuel flow.

The other faults now showing up could be a result of the battery now becoming tired after the starting attempts.
Once the battery voltage starts to fall, other modules can start to flag up non-existant faults.

If you have fuel flow the next step would be a VCDS read, & in the mean time get the battery charged.

[Crasher]

The battery could be getting weak, modern starter motors will spin an engine over on voltages that will not allow the ECU to inject fuel and this can throw people. Mind you, I am surprised the RAC chap didn't sell you a battery, call them out for a flat tyre and you'll get the battery sales patter!

[sef-75]

Thanks for the reply.

Noted, but the car just cut out whilst driving normally and won’t start again, it just turns pretty quickly on the starter when operated and does not fire at all. I can’t really see the battery causing the engine to just cut out in the first instance when driving along the road.

Hoping to try and borrow a fault code reader from a friend, hopefully will give more of a clue - where is the diagnostic connector port and is it just a case of plugging in and reading or do I need to do anything or press something etc?

Thanks again

[Crasher]

The diagnostic plug is under the dash above you right shin, if it is a generic code reader it may miss the fault such as a failed crank speed senor which is a common cause of sudden breakdown.

[sef-75]

Hi,

Thanks for advising.

Borrowed an Autel reader from a friend and connecting up, I get one code P0600 serial communication link $07E8.
Nothing else, still see the red exclamation mark in the bottom left of the display but also now a yellow flashing steering wheel symbol and beeping after taking out the key.

Seems to suggest an electrical fault?

Thanks

[Crasher]

As I suspected, I think the reader is missing something but the code stored and the other symptoms do suggest a low voltage problem, can you charge the battery?

[sef-75]

Hi there,

Thanks for the previous suggestions.

After recovery by a garage, advised that they changed the fuel pump in the tank despite assurances beforehand by RAC it wasn’t that but was the camshaft sensor, which was replaced and didn’t solve it. Not sure about all the faults though.

However, the story doesn’t end there... after a couple of weeks running, the engine occasionally ran with a light vibration that could be felt through the whole car when driving or even at idle, it wasn’t permanent. Would run fine some days.

Then one day it wouldn’t start no matter how many attempts made.

Garage this time seem to say they managed to start after extended trying and then has started first time every time since whilst there. Fault code reader apparently says misfire cylinder 4, current thoughts they have are an internal injector wiring harness.

Does this seem correct as after several hundred pounds so far and the prospect of further expense, the car has it seems become totally unreliable.

Thanks for any help and advice...

[Gazwould]

Not to mention the exploding BXE engine issue.

[sef-75]

Hmm...

Don’t go there, as in... been there, done that and got the T-shirt.

This is on the replacement BXE engine after having previously had a con-rod issue / broken engine issue a while back...

[FLAPPERJACK76]

Jack off side up, put it in 4th gear, turn os wheel by hand , can you feel compression on cylinder 4 compression stroke ? If not you have lost compression on that cylinder.
I would try this first as it is quick cheap and easy.
Sent from my SM-G970F using Tapatalk

[sef-75]

Hi there,

Thanks for the advice and suggestion - good idea... not done that yet, but initial thoughts from garage are not thought to be lack of compression as the problem comes and goes.

It can drive and run perfectly all day and then another time it has this vibration, then it can be fine again.

[spyderj]

Just posted this thread and then I read yours. The main electrical wiring harness is easy to see from the front of the engine.

This post is to inform others if they may be experiencing this issue of their car going to limp mode/shutting down while driving. Approximately 4 months ago, with about 175k miles, I was noticing that the car was shuddering/jerking intermittently. I had recently had my timing belt (http://shop.ebay.co.uk/?_nkw=timing+belt) changed, so I thought maybe it was off a tooth. Then I began doing research online and thought it was my MAF sensor (http://shop.ebay.co.uk/?_nkw=maf+sensor). I cleaned it and no change. After more research, I thought it was my DMF as it was knocking and needed to be changed. Changed the DMF, issue still present. I then heard it could be my EGR or DPF. I plugged in an OBDII and no codes were found.

I went to visit a friend and he did a quick search online and found a post that revealed the problem:

The main engine wire harness (http://shop.ebay.co.uk/?_nkw=wire+harness) that goes between the engine block (http://shop.ebay.co.uk/?_nkw=engine+block) and oil filter (http://shop.ebay.co.uk/?_nkw=oil+filter) - was melted against the engine block (http://shop.ebay.co.uk/?_nkw=engine+block) and was causing a short.

Here is the link to that post: Passat B6 CBAB engine cut off while driving - Page 2 (https://forums.ross-tech.com/showthread.php?13333-Passat-B6-CBAB-engine-cut-off-while-driving/page2&)

Here is a picture of my wire harness: http://www.vwaudiforum.co.uk/forum/attachment.php?attachmentid=35977&d=1559652248&thumb=1 (http://www.vwaudiforum.co.uk/forum/attachment.php?attachmentid=35977&d=1559652248)

The fix: Pulled it away from the block. There was no major compromise of the wiring, so I will likely be adding new heat tape. Since pulling it away from the block, I have not been able to replicate the fault.

Hope this helps!

[Crasher]

That is a known issue on the common rail but not the PD

[sef-75]

Thanks for the suggestions and advice.

Garage suggested an injector wiring harness beneath the rocker cover.

The car is at the garage and waiting to hear the findings.

[dazoswfc1867]

Did you solve the problem?

[DMitch16]

Did you solve the problem?

Seems that he did - loom melted and contacting hot engine. Happened to me on my PD where the turbo actuator loom dropped onto the turbo heat shield and started to melt. Engine cut out, hard to start, higher revs, subsequent cut outs, vibration and a crankshaft sensor fault (red herring as it happens). Re-insulated the wires and made sure the loom was fixed in position properly.