Got your air con on? Are the revs dropping and climbing as the compressor kicks in and out?
I had this problem and although it didnt stall, it was pretty close - which is a problem in an automatic when you're sat at the lights in rush hour.
I had a new battery fitted and, once the new one was reconnected, the Engine Management computer seemed to reboot and to "learn" how to deal with the issue and it's fine now.
sheck your message board it'll tell you could be lamp out
If you mean the engine will rev up and down as it is running, it has been my experience that a dirty air filter is a cause of the fluctuation.
It means you need to hook up to a computer with the Volvo software and pull codes.
P1651 is the same as Volvo code 981A, engine control module internal fault / faulty signal.
It means the engine has stalled and the key is on.
The dictionary meaning for the very fluctuate is "to rise and fall irregularly in number or amount". Something like blood pressure or waves on the ocean can fluctuate.
When your engine has a knocking noise, it could mean that a rod has been thrown. It could also mean you are low on oil.
Volvo means, I am rolling.
boo
Most likely you are burning antifreeze. This could be cause by a leaking head gasket or an intake manifold gasket. This condition needs to be corrected quickly, as it could lead to catastrophic engine failure.
It means you should go to a shop which has the appropriate software for your engine, and have them look up faults.
Stuff.. I mean, it should be in your owner's manual.hello a red light is on in my 1997 volvo 850 and it looks like a box with a fan in it could you please tell me what needs filling . thank you Donald Mead