After experiencing what traditionally feels like a fuel cut I scanned my car with VAGCOM to see if my cam-follower had worn out but it appears that it is a boost related problem.

When it says Boost Pressure Control Valve, this isn't referring to the diverter valve is it? If not does anyone know what exactly it is?

1 Fault Found:

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal - Intermittent

Freeze Frame:

Fault Status: 00101000

Fault Priority: 0

Fault Frequency: 4

Mileage: 30841 km

Time Indication: 0

Date: 2000.00.00

Time: 18:46:20

Freeze Frame:

RPM: 2577 /min

Load: 9.4 %

Speed: 52.0 km/h

Temperature: 92.0°C

Temperature: 14.0°C

Absolute Pres.: 1010.0 mbar

Voltage: 14.224 V

Thanks in advance.

N249 is a solenoid valve. Affects boost response. There was quite a lot of experimenting with various versions back in my ibiza days.

Check it for a loose plug connection. should have three small hose points and be either black or brown bodied (sort of like half a small ice hocky puck)

Chris

When I had my wife's Beetle Cab turbo custom mapped by Jabba it had a problem holding boost, this turned out to be the N75? valve.

They replaced it in about 5 mins and hey presto.

Maybe this is the same problem but the valve has a different number ?

I have a feeling that N249 is the DV.

N249 is a solenoid valve. Affects boost response. There was quite a lot of experimenting with various versions back in my ibiza days.

Check it for a loose plug connection. should have three small hose points and be either black or brown bodied (sort of like half a small ice hocky puck)

Chris

Thats the N75 that controls the wastegate. The N249 is a Stu correctly says the valve that activates the DV (isnt it a combined unit on the TFSI?)

Cheers guys...I just wasn't sure if it actually was the DV or if it was another part.

It's going in for a service on Thursday so it will get looked at then

I thought you had a Forge one Harry?

Surely this will be the solenoid on the Forge thats causing a problem then??

I thought they were part and parcel of the same thing.

I thought you had a Forge one Harry?

Yes I do. I'll get the car jacked up tomorrow and have a butchers.

Some confusion from my post i think.

In order for VAG-COM to register a fault it needs a sensor. Didn't realise the TFSI engines had the N249 as combined solenoid / valve unit now

As I recall the old recirc valves had no electronics on them at all.

Ta

Chris

The valve didn't but they still had a 249 controlling them.

Had this prob on mine also with forge dv. Faults only started coming up after panel filter was changed thou.

Tuesday,20,November,2007,08:44:58:61596

VAG-COM Version: Beta 710.0

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal - Intermittent

Freeze Frame:

Fault Status: 00101000

Fault Priority: 0

Fault Frequency: 53

Mileage: 19705 km

Time Indication: 0

Date: 2000.00.00

Time: 13:23:24

Freeze Frame:

RPM: 2305 /min

Load: 9.4 %

Speed: 46.0 km/h

Temperature: 79.0°C

Temperature: 6.0°C

Absolute Pres.: 980.0 mbar

Voltage: 14.478 V

Readiness: 0000 0000

---------------------------------------------------------------------------

Friday,14,December,2007,15:04:55:61596

VAG-COM Version: Beta 711.0

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal - Intermittent

Freeze Frame:

Fault Status: 00101000

Fault Priority: 0

Fault Frequency: 33

Mileage: 22700 km

Time Indication: 0

Date: 2000.00.00

Time: 10:07:57

Freeze Frame:

RPM: 2793 /min

Load: 11.4 %

Speed: 56.0 km/h

Temperature: 90.0°C

Temperature: 15.0°C

Absolute Pres.: 1010.0 mbar

Voltage: 14.224 V

008583 - Bank 1; System too Lean at Idle

P2187 - 004 - No Signal/Communication - MIL ON

Freeze Frame:

Fault Status: 11100100

Fault Priority: 0

Fault Frequency: 2

Mileage: 22693 km

Time Indication: 0

Date: 2000.00.00

Time: 14:37:34

Freeze Frame:

RPM: 811 /min

Load: 14.1 %

Speed: 0.0 km/h

Temperature: 87.0°C

Temperature: 6.0°C

Absolute Pres.: 1010.0 mbar

Voltage: 14.478 V

Readiness: 0000 0001

---------------------------------------------------------------------------

Wednesday,02,January,2008,08:25:32:61596

VAG-COM Version: Beta 711.

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal

Freeze Frame:

Fault Status: 01101000

Fault Priority: 0

Fault Frequency: 254

Mileage: 23087 km

Time Indication: 0

Date: 2000.00.00

Time: 16:13:11

Freeze Frame:

RPM: 3036 /min

Load: 10.2 %

Speed: 61.0 km/h

Temperature: 67.0°C

Temperature: 10.0°C

Absolute Pres.: 1010.0 mbar

Voltage: 14.478 V

Readiness: 0000 0001

---------------------------------------------------------------------------

Wednesday,23,January,2008,17:13:53:61596

VAG-COM Version: Beta 711.1

Address 01: Engine

Control Module Part Number: 1Z0 907 115 A

Component and/or Version: 2.0l R4/4V TFSI 0040

Software Coding: 0203000318070060

Work Shop Code: WSC 60909

5 Faults Found:

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal - Intermittent

Freeze Frame:

Fault Status: 00101000

Fault Priority: 0

Fault Frequency: 250

Mileage: 26530 km

Time Indication: 0

Date: 2000.00.00

Time: 08:30:05

Freeze Frame:

RPM: 2150 /min

Load: 17.6 %

Speed: 87.0 km/h

Temperature: 90.0°C

Temperature: 7.0°C

Absolute Pres.: 1010.0 mbar

Voltage: 14.47

Readiness: 0000 0000

---------------------------------------------------------------------------

Friday,01,February,2008,16:55:18:61596

VAG-COM Version: Beta 711.1

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal - Intermittent

Freeze Frame:

Fault Status: 00101000

Fault Priority: 0

Fault Frequency: 146

Mileage: 30349 km

Time Indication: 0

Date: 2000.00.00

Time: 13:15:10

Freeze Frame:

RPM: 2216 /min

Load: 11.0 %

Speed: 90.0 km/h

Temperature: 91.0°C

Temperature: 9.0°C

Absolute Pres.: 980.0 mbar

Voltage: 14.351 V

Readiness: 0000 0001

---------------------------------------------------------------------------

Thursday,21,February,2008,17:01:54:61596

VAG-COM Version: Beta 711.1

Address 01: Engine

Control Module Part Number: 1Z0 907 115 A

Component and/or Version: 2.0l R4/4V TFSI 0040

Software Coding: 0203000318070160

Work Shop Code: WSC 60909

4 Faults Found

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P2261 - 008 - Implausible Signal

Freeze Frame:

Fault Status: 01101000

Fault Priority: 0

Fault Frequency: 254

Mileage: 32602 km

Time Indication: 0

Date: 2000.00.00

Time: 00:10:35

Freeze Frame:

RPM: 3153 /min

Load: 10.2 %

Speed: 128.0 km/h

Temperature: 90.0°C

Temperature: 8.0°C

Absolute Pres.: 1000.0 mbar

Voltage: 14.351 V

Readiness: 0000 0001

---------------------------------------------------------------------------

That's interesting, Sibart. Is it a malfunction of the actual Forge DV then? Should I seek a replacement?

I would have thought so Harry.

That's interesting, Sibart. Is it a malfunction of the actual Forge DV then? Should I seek a replacement?

Do you still have your original one? You could try that? Process of elimination and all that....

Chris

I do have a brand new OEM valve yes. I've had a look at the vacuum lines to the Forge valve and it all looks ok (I've not removed and inspected the valve itself however)

I'll take it off for a look tomorrow when I have some time.

Chris - The Forge DV transforms a solely electronic N249 into an electro/Vacuum unit by replacement of the entire DV and adding some parts. Swapping back to the original might not necessarily prove anything other than as we suspect there is a fault with the Forge actuator.

Harry - Give them a ring and ask them to send you another unit out.

An interesting thing to note is that all of the codes on Harry and Simon's car have occured at minimal load and relatively slow speed, possibly on lift off of the throttle.

Wonder what triggers it - High pressure seen on the MAP sensor? If so then replacing the Forge wouldn't help and it might be as a result of the so called spiking. I know many of the US guys now fit something to reduce the spike.

Cheers Stu. I'll be on the phone to Forge in the morning.

Getting rid of the car harry so dealer can sort it lol, like Stu said thou its strange that its coming up off load.

Got me wondering about fitting forge dv on the new one thou. Silver by the way, find race blue a bit common now:rofl:

Oh out of interest what map are you running with Harry?

Oh out of interest what map are you running with Harry?

The same as your intended :P

The same as your intended :P

Will be monitoring this thread closely as I fitted mine yesterday...

Keep us posted Harry.

One thing I might just add. The Forge BOV still makes its noise as normal hinting that the DV hasn't failed at all? The car drove fine on the way to work this morning.

The piston might be sticking in the DV? Used to be a common problem. How old is it? Has it got a standard spring in it?

Chris