Home Staging Services
May 25th, 2007
Question: Golf GT TDi safe drive home mode when cold?
I have a 2000 Golf GT TDi 115, and when it is cold, it frequently goes into safe mode, where it won't rev and just limps along. No message on the display when it happens. If I stop and start the engine again it will be OK, but sometimes it does this more than once. I am not thrashing it and it will do this at around 3000rpm. The temperature gauge is errartic and I thought that perhaps if the ECU was seeing it as being cold, it might be the problem, but last week, I noticed it happened when the temp guage was reading fine and the car was fairly warmed up. I had thought at one stage it was that the oil was low and perhaps when it was cold, there coudl be momentary low levels and pressure drops, but it definitely happens when the oil is spot on now. Usually this happens in the first 5 miles or so of my journey and if it gets past that it is ok.
The car has done 104000 miles and that is genuine and VW servicing. Any ideas or information appreciated.
Answer: From a series of earlier answers on what people say is the turbo cutting out, I think this is most likely to be the airflow sensor, which is a section of pipe between the air filter and the turbo inlet. It is also possible that the pre-filter screen is clogged. Trace that back, and remove it/clean it. At >100K miles and 8 years, if the servicing has not been thorough (and main dealer servicing is not necessarily that), it could be that you have all those years and miles of bugs blocking airflow. You might have seen a drop in mpg over the last few years and put it down to general ageing. Before buying anything, I would suggest checking the filter screen. If it is dirty take it out and run the car and see if the problem recurs. There is no damage to be done as the main air filter will still be in. If the car still misbehaves, wiggle the connection on the airflow sensor. Most sensor devices are extremely reliable and usually faluts come down to the weakest lkink, which is often the metal to metal contact where the device plugs in. If that gets a bit oxidised, then it can appear as a fault, but be restored by breaking and reconnecting the plug, which scrapes back to bare metal to metal contact. Good luck.
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