cliffcoggin

Syed.

All I hear in the first and second videos is the normal diesel clattering. I don't hear even that in the third video. Unless you have other symptoms of engine problems you have nothing to worry about.

Syed.

I do not download anything from untrusted sources, so if you would care to put your videos on Youtube or similar I'd be glad to listen them there.

Ditto what Gareth wrote. Let me add that it is always wise to change the water pump belt at the same time as the cambelt because the same expensive work is needed to access them both.

Glad to read that. Common sense and a inquisitive mind can solve more problems than any amount of computer diagnoses.

Regards, Cliff, a one time chemist with absolutely no electrical qualifications.

Dave.

Your error codes are still showing a short circuit or open circuit, just as they did two months ago when I suggested there was either water present or a broken connection. You will need to get a meter (and learn how to use it,) or take the car to somebody electrically proficient because tugging at the wires will not reveal the exact location of the fault.

Magnet, who is one of the regulars here, often suggests

https://www.partsinmotion.co.uk/

I have never needed to use the company so I have no idea about its service.

Emma.

I don't know these particular parts, but it would be worth investigating a secondhand heater matrix from online car breakers.

1 hour ago, DanY said:

I checked the servo this morning by dipping a zip tie into the vacuum hose hole. There was no fluid in there which still leaves me confused as to why I have fluid behind the brake pedal. I've ordered a second hand servo and master cylinder anyway, so, with some new brake fluid to go with it I'm sure that will sort it. 

The fluid behind the pedal is because the cylinder is leaking, as I mentioned earlier. It's a common problem on old hydraulic systems and nothing unusual.

A secondhand master cylinder is, to put it politely, unwise. To put it less politely, it is downright foolish to fit equipment that not only may leak as badly as the original, but could in fact fail to work at all when you most need it in an emergency. You may be willing to risk your own life, but please consider the lives of other people in and around the car.

Dan.

The brake master cylinder is defintely leaking and needs to be repaired or renewed. I don't see why there should be fluid in the servo but it would not hurt to check.

The low oil consumption suggests the engine is in reasonable condition for its age, and in standard form would likely not have high CO emissions. Therefore I'd say your modifications are responsible for the problem, and the solution is to restore the engine to standard form.

3% carbon monoxide is extraordinarily high. What was the CO level before you changed the induction system?

The engine is getting on a bit at 175000 miles. What is the oil consumption? Does it smoke? Does it still have a functional EGR valve? Has the engine been modified in other ways?

17 hours ago, K.R. said:

The garage. They have changed the speed sensor, this has taken away the ABS light, but the traction control light still stayed on. After another diagnosis they said the ABS module is faulty 😒

I suggest you take the car elswhere for a second opinion before spending all that money. Unless the garage is using a professional code reader and knows how to interpret the results it could be leading you on a wild goose chase. The reason is that one fault can generate many unrelated false error codes, so it is essential the "technician" knows how to sort the wheat from the chaff. Even if the garage is convinced the ABS module is faulty I would ask for a guarantee that replacing it will eliminate the problem.

Kat.

Who or what is telling you that the ABS module is faulty? The dashboard lamp, a proper VAGCOM diagnosis, a cheap code reader, a mechanic, or something else?

It could be a back tyre issue, or any of a dozen different issues from the sparse information you have provided. Whatever the cause, if you bought the car recently take it back to the dealer you bought it from.

Diane.

Have you read the whole thread? There are suggestions near its start, and questions which would help all of us to home in on your problem.

Thanks for letting us know.

In your postion I would ask first the company what sort of guarantee it offers.

Musty.

Sasidhar, like so many newcomers, has not visited the forum since posting his request for help four years ago. It's unlikely he will return now.

Dan.

It would help if you gave some details of the engine such as its size and fuel.

Mark.

As you suspect, the topic has been discussed many times here. It would pay you to search the forum to get some clues about your problem.

12 hours ago, JohnHa said:

I reasoned it must be something to do with the alarm ...

Indeed it is.

As I mentioned two days ago, "The battery needs to be coded to the car, otherwise you will get a variety of electronic faults and spurious alarms."

I am not saying the lack of coding is definitely the cause of your problems, but until you eliminate that possibility there can be no logical resolution from error messages.

The EGR should last much longer than that, so I believe there is something else wrong with the car. Are you telling us the car has been remapped since it was manufactured?

Then your car must be unique. Every other A3 of that era needs the battery to be coded to the car.

The battery needs to be coded to the car, otherwise you will get a variety of electronic faults and spurious alarms.

Sorry, but I will not download files from unknown sources.