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Key remote stopped working - How to determine the cause?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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TJWookiee
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Joined: 4 April 2013
Year and Model: 2006 XC70 CC
Location: Bronx, NY
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Key remote stopped working - How to determine the cause?

Post by TJWookiee »

When I bought my 2006 XC70 a year ago, the owner only had one key, a switchblade key remote. I noticed early on that I had to replace the fob battery more than I expected, but over the course of the year, the remote has just stopped working altogether. I've been using the physical key to unlock and lock the car, there doesn't seem to be an issue with the locks at all, but I'm trying to slowly restore functionality to the car (don't get me started on the aftermarket head unit replacement someone did on this without thinking about the backup sensors).

Where do I start to try figuring out what part of this isn't working? Is there a need in this bughunt for VIDA? I'd like to avoid a trip to the dealer, they quoted $750 for a second key and that's when the original fob was working. For a 20 year old car (albeit one I'm trying to care for), that's steep.

(Apologies if opening a new thread is considered bad etiquette, I wasn't finding any that closely fit this issue)

TJWookiee
Posts: 50
Joined: 4 April 2013
Year and Model: 2006 XC70 CC
Location: Bronx, NY
Has thanked: 5 times
Been thanked: 9 times

Post by TJWookiee »

I should add I've tried a few remedies suggested online: replacing fob battery, resetting the UEM, charging the car's battery. I am wondering if heat is a factor since this seemed to come up as the weather changed, and the previous owner kept the car in a tree-covered area while I'm usually parked in direct sunlight.

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jonesg
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Year and Model: 2004 V70
Location: Northern maine.
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Post by jonesg »

yagger is highly rated , nowhere near dealer prices either.

https://www.datatransferring.com/volvo- ... te-control

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