Question about 2004 Volvo S60
Done about 80,000 miles and warning light comes on at iregular intervals to says service maintenance required and when this happens it cuts speed down to 60 max. also mot has failed on emissions is this the cause?
When the speed is reduced, this is called "limp home mode". This is activated when the engine detects a fault rather than the requirement for a service. If a service was required the service light would display for 2 minutes after turning on the ignition.
The car has an underlying fault which will require diagnostics. I had the same problem on my 01 S60, which turned out to be a throttle body, which required cleaning. I contacted Volvo UK customer service as I had learned that this was a common problem and had it cleaned under a recall notification. It may be worth finding out if your model is part of this recall
Posted on Jul 30, 2009
What really happens is your service check indicator light switches itself on due to completion of 10,000 or 5,000 Km (depending on the manufacturer's specs) from your previous oil change or service. The internal clock keeps track of your mileage travelled and let you know when the 10,000 or 5,000 km is up. All that is required is to RESET the service indicator light. On some cars, the resetting of the service light can be done by the car owner which normally involves pressing a button at the front Instrument Panel and so on and so forth. If you have the user manual for your car, I suggest you read it to see if there is anything on resetting the service light.
The bad news is not all vehicle manufacturers have a reset button at the front dashboard, and some requires the use of a Diagnostic Scanner to do this. Ask your mechanic if you are not sure.
The speed is cut down to 60 is due to the fact that if you continue to drive your car after the prescribed mileage without changing the engine oil, there will be 'accelerated' wear and tear to your engine and perhaps even an early engine overhaul. Driving with a long overdue engine oil change is bad but driving it at speed would be worst. I believe you get the drift.
As for your mot test, it is mandatory that no warning light whatsoever should appear at the instrument panel but yours showed up.
Posted on Jul 22, 2009
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Posted on Jan 02, 2017
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