mohamedali21

Sorry guys but I also gave a similar problem, on cold start it don't start, I replace fuel pump and filter a month ago and everything was fine until yesterday morning when I tried to start it and it's sound like it's not getting any fuel. I tried a few times and it finially started with my foot on the gas. Any ideas?

devinsixtyseven

Drop the back seats and listen for the fuel pump when you turn the key to ACC (don't kick the starter yet). No pump sound = dead pump.

No start when cold...could be many things.

No hot restart could be CTS, CPS.

No VAGCOM means you will be throwing parts at it until you have the codes pulled. Each one of those sensors will post an error code when it begins to fail, but will not necessarily light the CEL.

mohamedali21

When I put the car to ACC no sound and I check for power and got nothing. Might be the relay or it needs ignition for power?

mohamedali21

I try to start and now gets power...

mohamedali21

runs now after a few crank, i did a vagcom scan and no cel so i did an automatic scan and her's what i have, looks like fuel level sensor. this is a new fuel pump only 1 month old

VCDS-Lite Version: Release 1.2
Tuesday, 04 November 2014, 18:08:14:49309


Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,06,08,15,16,17,18,22,34,35,36,37,45,55,56 ,57,65,67,75,76,77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.LBL
Controller: 4B0 907 551 AL
Component: 2.7l V6/5VT G 0001
Coding: 06752
Shop #: WSC 02325
VCID: 6EAF8D26398F
WAULD64B02N088891 AUZ7Z0A1982090
No fault code found.
Readiness: 0000 1000

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 01V-927-156.LBL
Controller: 4B0 927 156 DR
Component: AG5 01V 2.7l5VT USA 1819
Coding: 01002
Shop #: WSC 02325
VCID: 7A87B17675C7
1 Fault Found:
17125 - Torque Converter Clutch: Stuck OFF / No Power being transferred
P0741 - 35-00 - -

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 4B0-614-517.LBL
Controller: 4B0 614 517 H
Component: ABS/ESP allrad 1728
Coding: 06397
Shop #: WSC 00000
VCID: 263FB506D1FF
No fault code found.

-------------------------------------------------------------------------------
Address 06: Seat Mem. Pass Labels: None
Controller: 4B0 959 760 C
Component: Sitzmemory R1 BF 0103
Coding: 00003
Shop #: WSC 00000
VCID: 2D2D4A2AF409
No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.LBL
Controller: 4B0 820 043 AD
Component: A6-Klimavollautomat 0105
Coding: 00010
Shop #: WSC 02325
VCID: 5CCBD7EEDF33
3 Faults Found:
01274 - Air Flow Flap Positioning Motor (V71)
41-10 - Blocked or No Voltage - Intermittent
01592 - Air Quality Sensor (G238)
57-00 - Electric Circuit Failure
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 4B0-959-655-AI7.LBL
Controller: 4B0 959 655 N
Component: Airbag 8.4E 4001
Coding: 0000307
Shop #: WSC 02325
VCID: 3B0974723A7D
No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 4B0-907-487.LBL
Controller: 4B0 907 487 H
Component: Lenkradelektronik D00
Coding: 01012
Shop #: WSC 02325
VCID: 3115565AE831
No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-920-xxx-17.LBL
Controller: 4B0 920 981 P
Component: KOMBI+WEGFAHRS. VDO D09
Coding: 02264
Shop #: WSC 56344
VCID: 33195C52122D
WAULD64B02N088891 AUZ7Z0A1982090
1 Fault Found:
00771 - Fuel Level Sensor (G)
30-10 - Open or Short to Plus - Intermittent

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 4B0-920-xxx-17.LBL
Controller: 4B0 962 258 J
Component: Central Lock/Alarm D35
VCID: 3013535EE33B

tytower

I have an A4/B6 2.4 litre V6 Limousine Model front wheel drive with multitronic box .

Can someone tell me where the "Coolant Temperature Sensor " is located on the engine or on radiator?

Mine also has the no starting when hot bit with a strong petrol smell too so I am sure its the sensor . Vag comm tells me the sensor is faulty too. Just need to find it?Anyone got a diagram or a link to one?

devinsixtyseven

I assume you mean 2.7...? CTS is on the coolant pipe behind the block on the passenger side, just beneath the corrugated intake tube. STFA, there's a good writeup in the tech section, with photos...used it when I did mine the first time.

Save yourself some downtime by buying two sensors instead of one...they're cheap, and they're quite possibly the most common sensor failure on the car.

tytower

I'm in Australia and its 2.4L actually and I thik the sensor will be on the drivers side now if it is below the air intake tube.Us being upside down to you.
Thanks.

mohamedali21

Thank you everyone for helping me, my car problem was the coolant temp sensor. It was reading 105c at cold and sit for 2 days so I know it's not correct. Change it and it's all good now. Thanks guys

devinsixtyseven

How long did yours last? I just replaced one, it failed at 65k miles.