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weird check engine message

Old 03-17-2008, 03:49 PM
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Join Date: Feb 2008
Posts: 27
Default weird check engine message

i get a weird message that says reduced guard when i turn my car on and the check engine light came on when this message came up but the message is only up when i turn the car on. does anyone know what reduced guard means?
Old 03-17-2008, 06:17 PM
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Join Date: Mar 2008
Posts: 368
Default RE: weird check engine message

I'm guessing it has something to do with the alarm system. Do you have a perimeter sensor in your car (there will be a switch under the climate control). It's possible the switch was pressed, causing the perimeter sensor to become disabled (or reduced guard) or something is wrong with the security system.
Old 03-17-2008, 08:28 PM
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Join Date: Jan 2008
Location: Dayton, OH
Posts: 463
Default RE: weird check engine message

I believe it may also have something to do with the interior alarm sensor not being enabled?
Old 11-06-2010, 06:47 PM
Join Date: Mar 2010
Posts: 32

I know it is a 2 year old post, but after the grandkids left, my 2001 S80 T6 began displaying "Reduced guard -- see manual". Nowhere, absolutely nowhere in the manual is the term "reduced guard" addressed. Glad the OP had the problem. Now I know where it came hitting buttons.
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