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Ask Your Question1999 Volvo S70
Question: Drive Cycle Monitors
Question
I have 3 monitors Not Ready (1. Catalyst 2.Evap. System 3.02 Sensor. I need only to activate 1 of these 3 monitors to Pass the State test(CA) .Also the Check Engine lite did not lite up nor were there any codes printed showing a problem. I need to get a Drive Cycle instruction in order to get the monitors back on line.. Can you help me
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Answer #1
Bret Bodas December 24, 2009, 10:32
MasterWhat you will find is that the O2 Sensor monitor must pass before the other two (Catalyst/Evap System) will run. So the monitor to focus on here is the O2 Sensor Monitor. Here is an article that explains much of this is better detail. http://repairpal.com/drive-cycle-emissions-readiness
One thing to check is your car battery, if for any reason the voltage drops below a certain voltage when starting the vehicle, the drive cycle monitor tests will not run. You may not even notice any starting performance issues. On this vehicle, the B+ cable often causes this issue, so get that checked.Flag ThisLike | 5 people like this5 -
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Visitor, June 01, 2010, 22:44Replythank you bretb, my dad replaced the battery on my 2004 buick century.and the same exact sensors are not ready. thank you much, cynthia from phoenix,az
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