Engine Cutout - VCDS Codes

[bobski1]

The car (VW golf, 08, manual GTI) has been running okay but on a recept shopping run car started to lose all power & EPC light came one. Turned the car off and on, light disappeared and drove fine. On return journey happened again twice. Cleared the codes and ran it again, following codes came back:

License Plate: GTI
Mileage: 175820km-109249mi Repair Order:

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Address 01: Engine Labels: 06F-907-115-AXX.clb
Control Module Part Number: 1K0 907 115 Q HW: 8P0 907 115 B
Component and/or Version: 2.0l R4/4V TFSI 0020
Software Coding: 0403000318070060
Work Shop Code: WSC 08708 803 00000
VCID: 346742E5572A332D97-8060
2 Faults Found:

004917 - Engine Torque Monitor 2
P1335 - 008 - Control Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 2
Fault Frequency: 2
Reset counter: 255
Mileage: 175815 km
Time Indication: 0
Date: 2000.00.00
Time: 17:35:59

Freeze Frame:
RPM: 2282 /min
Load: 58.0 %
Speed: 62.0 km/h
Temperature: 91.0°C
Temperature: 14.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V

000136 - Fuel Rail/System Pressure
P0088 - 001 - Too High - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 175823 km
Time Indication: 0
Date: 2000.00.00
Time: 18:11:11

Freeze Frame:
RPM: 1784 /min
Load: 27.4 %
Speed: 48.0 km/h
Temperature: 91.0°C
Temperature: 16.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.224 V

Work I have done on it since I've had it:
New temp sensor
New cam follower & o-ring
New thermostat
It already had an aftermarket Ram air filter.

- I've checked the throttle pedal and its smooth from 0% and goes to 99.6%, returns fine.
- I've gone through some of the other measurement block and they appear to be okay but I'm not sure what the baseline should be i.e. fuel pressure was around 4bar
- Every now and again there is a misfire but it's not long or frequent enough to log an error code

Any advice or guidance on what this could be?

[Belle427]

I'd start by checking the intake side of things such as all hoses connected and secure etc.

[ninjag]

Check your fuels trims, they can usually help point you in the right direction.

[bobski1]

Belle427 said:

I'd start by checking the intake side of things such as all hoses connected and secure etc.

What am I looking for, any air leaks? would it be inward pressure? Think I'll have to buy some leak detector spray

ninjag said:

Check your fuels trims, they can usually help point you in the right direction.

What do you mean fuel trims, what I mean is what am I looking for in the measurements?

Edited by bobski1 on Sunday 20th November 20:32

[Belle427]

For air leaks yes any hose's that may have been poorly fitted or left off etc.
Boost hoses worth checking underneath.
Usual suspects on these really, cam follower, dv, pcv valve.
Is it a Ramair induction type kit or just a panel filter?

[Belle427]

https://youtu.be/iYmOnXPBrB0

Fuel trims explained.

[bobski1]

Belle427 said:

For air leaks yes any hose's that may have been poorly fitted or left off etc.
Boost hoses worth checking underneath.
Usual suspects on these really, cam follower, dv, pcv valve.
Is it a Ramair induction type kit or just a panel filter?

So it is a cone filter with pipework - this kit fitted before I bought it https://thetuningstore.co.uk/ramair-2-0-tfsi-v-a-g...

I've check the PCV valve by lifting the dipstick whilst running and it runs rough when I do this, anything else to check?

It could be the DV, it has consumed a decent amount of oil but looking at the values I think it is still in the normal window. Would a dodgy DV cause the above issues?

I think I will start from the intake and work my way round the engine, I have had a lot of the pipework off when I did the thermostat but it's been a while so if I had missed something it should have flagged much earlier.

[bobski1]

Belle427 said:

https://youtu.be/iYmOnXPBrB0

Fuel trims explained.

Great video thank you for this, is the video right that a 10-12% swing (pos or neg) is acceptable? Will plug in tonight and see what it is.

If it is positive or negative where does that point to next?

[blank]

Is it remapped?

[bobski1]

blank said:

Is it remapped?

I don't think it is, the guy I bought it from was unsure as there was no paperwork to say it had. I was planning on taking to a place on friday to get it read and see if it has been mapped.

What significance would that play?

Had it for around 5k miles and only things changed on it are just maintenance items, I did think of removing the air intake but until I know it isn't remapped I wasn't going to change it

[Belle427]

In my experience air leaks and a bad pcv result in an elevated idle speed.
Difficult to guess at really if it drives ok most of the time.
Maybe check the maf sensor side of things as some air filters can be known to cause problems but that's unlikely.

[ninjag]

bobski1 said:

Great video thank you for this, is the video right that a 10-12% swing (pos or neg) is acceptable? Will plug in tonight and see what it is.

If it is positive or negative where does that point to next?

Short Term Fuel Trims can fluctuate, but the Long Term Fuel Trims really should be zero or near enough zero.

If positive then that means the car is leaner than expected, so it's having to add additional fuel. So you have to think about what could cause it to run lean, such as clogged fuel injectors, vacuum leak, faulty fuel pump etc.

If negative, then there car is running richer than expected, so it reduces fuel. Things like a leaking injector, restricted air filter, restriction in the exhaust.

A faulty O2 sensor could be applicable to either. Fuel trims won't always help reveal the problem and they won't tell you exactly what's wrong, but often it can help you start looking in the right places and save a lot of time and money.

[bobski1]

Understood, got to check the boost pressure to see if it is mapped or not also.

Plan is to run it without the MAF to see if it runs any smoother.

I am wondering if the high torque error has something to do with the high pressure given it came first and the car couldn't keep with the demand of how much fuel was required and the pump went too high a pressure.

[bobski1]

Managed to solve one issue which picking up another. Ran with measuring block 32, 33 & 115 which are both short & long fuel trims & boost pressure.

Was -25% short term trim & very minimal boost, car didn't feel like it was pulling either. Massive negative meant it was running very rich so clearly no air was getting in. Tried 2nd run without the MAF sensor & ran the same. It also didn't change idle when plugging / unplugging the MAF.

Back on the ramp & underway off & started to investigate pipe damage. Found some damage on the metal tang on the boost pipe from turbo to intercooler.

Turns out that under acceleration the pipe was coming out, give it a slight touch and the whole thing cane out.

40min trim later and new pipe in hand fixed the issue.

Now it's flagging boost error p0299, likely the diverter valve. One on order and collecting tomorrow. Hopefully should be running sweet again after that.

[Belle427]

Common faults those hoses once they get on a bit, good work so far.

[bobski1]

Yep those metal tangs don't work great I remember replacing a number of boost hoses on my ibiza for the same reason.

Pcv still working which is good so hoping after dv then some minor elec gremlins and it's back on the road

[Belle427]

I used a self tapper to hold one in place on a previous car, obviously you drill through the fitting first but not that tricky.
Some go for cable ties arranged to pull them together.
A bit of a lash up but works ok.

[bobski1]

Unfortunately the metal collar had cracked all the way so not really repairable, just bought a new hose instead.

Just waiting on the call to say the DV has arrived & will get cracking. I am wondering where it is. Some videos show taking the wheel/liners off & others are easy access from underneath.

Hateful things the VW connectors though

[bobski1]

One hurdle cleared but another to fix. DV was definitely gone and the new one makes a lot of difference this thing is fast & mapped was seeing 2300mbar flat-out so around 18psi!

Cleared the codes and got the p0299 again. Assumptions now is that it's the N75 regulator valve. Not an expensive part but slight pain in the rear as I could've got one today but everything is now closing in time for me to get there.

Will order one for midweek & get it fitted Friday.

[Belle427]

Don't know if this helps.
http://wiki.ross-tech.com/wiki/index.php/16683/P02...