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Hello, I'm Jason. I will do my best to answer your question quickly and accurately using the information you have provided.
This sounds like a pretty significant problem, and one that suggests to me that driving the car any further would be a bad idea
I'll hold for a bit in live chat to see if you can join
Still holding, but let me ask a few questions first
I assume this is a 2.0 gas rather than a 1.9 diesel
Knowing what the fault codes are would be extremely helpful on this one
and how many miles are on it
Ok, so how long has this been going on, and what are the fault codes?
Ok, can I make the assumption that your mechanic is more of a general type, rather than someone who knows VW well?
the code retrieval process is a pretty straight forward one
Ok, so I can make some general comments and suggestions here, but data is paramount
this is so I don't suggest throwing the kitchen sink at a problem, which would cost a lot of money
not to say that this would be a cheap fix, but again, I can only go on my own experience with these cars
Do you happen to know why the trouble retrieving fault codes? Any generic parts store reader should do the job fine
If the engine light is on or flashing, the ECU will store those codes indefinitely, which is why I was inquiring about the mechanic
even if the engine light turns off on its own
now, if the engine light flashes, this means an ignition misfire, which also means that raw fuel is being dumped into your exhaust system, which can potentially damage your catalytic converter
If you don't mind me being direct, your mechanic is not being truthful with you, regarding fault codes
Ok, let me suggest a few things first...
1) find a shop in your area who knows VW.
but I'm not saying that as a cop-out, since I do have a couple of ideas here
save this link to find a good VW shop
now2) the flashing check engine light, and loss of power is quite possibly the central ignition coil
they develop cracks over time, and instead of the spark going to the plugs, it escapes to ground
does this issue happen more when it's damp/wet out?
ok, because that would contribute to my theory about the coil. Cracked coils act up more when moist
now, let's take about the flashing temp light. How long have you had this car, and when was your last timing belt/water pump/thermostat replacement?
Ok, so my next thought is that the reason for the flashing temp light is because of a coolant flow problem, likely due to a failed water pump impeller.
The stock impellers are plastic and crack over time
Let me show you pictures to explain
ok, one moment, phone call
Ok, let me know when you can see this pic
Ok, obviously, this is a damaged impeller. At worst, it completely breaks apart, and does not circulate coolant at all
So, in sum, I think we've possibly got 2 separate problems....
however, if the car get very hot, it could cause the power loss as you describe
which is why I suggest not driving it until both issues are diagnosed properly
you don't want to deal with a cylinder head gasket replacement also
Well, if my assumptions are correct, a coil costs about $225 and takes an hour to replace
a full timing belt/water pump/thermostat replacement is about $800 at a good independent shop
again, these are just assumptions based on your description of the symptoms, rather than hard data
However, it's very bad to drive a car with 1) a misfire and 2) cooling system problems
if left unchecked, the repairs will outweigh the value of the car
not that I can offer right now.
But more than happy to help in the future, once you have more information, or have other questions about your car
I'm quite familiar with them
this is my direct link
after rating, you will get a link in your email to reference
I'm not allowed to email customers directly
but the system does that