2002 VW Golf emission warning light was on. In garage yesterday for repair - part replaced. Light on again to day! Any ideas.

The warning light more times than not is coming on because of the emission system. There are several sensors that are hard to diagnose even for a professional with a computer. First place to start which is cheap and easy is to use a fuel treatment for a few tanks of gas. This has worked for me in the past by cleaning out the fuel injectors and fuel system. From there if this does not work you will have to check O2 sensors everywhere they are and replace.

the dsg is the worst gear box a man kind ever built, i would rather ride a hyundai with a normal gear box.
DSG has a numerous malfunctions and problems!!!!
I`M REALLY DISAPPOINTED!!!

go to an accredited service center that has experience on your make of car as the guessing is costing you money
the first thing that a professional shop would do is run the fault codes and then decide which codes were attributed to the problem
removing the fuses may cause more problems because you have no idea what the problem is and will never have any idea until the codes are read

Bad gas maybe, maybe junk in tank from bad gas or it could b the cadalidic converter

you need to pull the codes and go from there

i also have a 2002 VW Polo 1.2, which I bought in January this year. The first time i drove it the engine management light came on. I took it to a garage and they changed a sensor in the exhaust system at a cost of £350. I drove the car again the following week and the light came on again, I took it to the same garage and they told me it was unrelated and that i needed another £300 repair. Refusing this I took the car to my parents mechanic who told me that these lights are prone to coming at the slightest little thing and to ignore it if the car is driving fine and sounds normal. He said that if there was a genuine problem that you wouldn't need the light to tell you but that the problem would be obvious through the sound it made or by the way the car started to drive. He said he felt the sensors were over sensitive and were there largely to encourage owners to take their cars into the garage for expensive repairs which didn't need doing.
He told me to drive the car as normal and ignore the light. He said only take it to a garage if there is an obvious problem, otherwise I was wasting my time and money.
I now drive the car without worrying abou the light and so far I haven't had any problems.
Suggest you do the same.

did you check the button inside the door near the hinges ? push it in and see if this clears this ...

I bought a 2000 polo 1.4 yesterday after having an MOT. The warning lamp came on today but the car is running fine. Whether its the Lambda sensor or just the light itself is a common fault, I think garages turn off the lights to get it through the MOT then they come on again in a day or two!

take it to a garage and hook up to computer this will give you a code for the problem

I had this problem myself and was told it could be one of 3 things

1. ignition coils are on their last legs and would need replacing (there are 4 of them in a VW golf)

2. The throttle housing is knackered and needs replacing as it has caused the motor that powers the accelerator to stop working and

3. The catalytic converter has an excess of carbon stored within it and has caused a defect.

All 3 of these jobs are notoriously expensive. Much to the delight of whoever it is you have gone to see....