Question about 1998 Volvo S90
That code is for the engine coolant temperature sensor. You need to have a look at the connection to it, if it's good, replace the sensor. This is an important engine sensor, they are usually mounted somewhere near the front of the engine in the water jacket, exposed to coolant flow so make sure the engine is cold when you change it.
Posted on May 14, 2009
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Posted on Jan 02, 2017
The OBDII on this model could take up to 2 months to reset. If you are in CA and need to get a smog cert. the state will bypass the OBD check out portion of the inspection. Volvo has a special test drive to reset the system, but nobody that I know has had any success without a road dyno and several hours.
Posted on Mar 02, 2010
Hello and welcome to FixYa!
As a first course of action, I strongly suggest that you remove the positive battery connector and let it sit for atleast 10mins. or more before reconnecting it. This will reset the system and can get rid of the dash lights.
If the problem still persists, I suggest that you take it in to a reputable shop to have it resetted manually.
Hope this helps and thank you for using FixYa! Have a good one!
Posted on Aug 07, 2011
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