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My Volvo S60 won't even crank, it says start prevented try again, I took it down to my mechanic to help me check on the radio because it has been going on and off for a while and finally didn't come on again, I drive it down to his shop but trying to diagnose what could have happened by changing the battery, testing all fuses (which were all functioning well), confirming the relays are fine, then we tried starting and it says on the scanner "ECM 720A, immobilizer communication" please any helpful way out will be really appreciated

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His it your key

Posted on Oct 07, 2018

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Hi,

Im researching this thread which Im going to link.
did you try flipping the key over in ignition 180 degrees and or put a new battery in the key fob?

Battery drained Immobilizer problem revisited Volvo Forums Volvo...

Posted on Oct 04, 2018

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Posted on Jan 02, 2017

alicantecoli
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SOURCE: 2001 Volvo S60 2.4 won't start

volvo only to release immobliser

Posted on Nov 13, 2008

  • 14092 Answers

SOURCE: I have a 2004 volvo s60, a few months ago I drove

change battery cables.if your battery over 5 years over replace it.i had same problem with batteries after 5 years .i am looking at starter you replace starter relay . but the starter could have a open circuit.take it off have it tested at auto zone or advance auto. they wont charge you to test it.

Posted on Apr 24, 2009

  • 1 Answer

SOURCE: 2001 Volvo S60 2.4 won't start

try to start your car with the valet key instead of master should start right up problem is master key.

Posted on Jun 01, 2009

  • 1 Answer

SOURCE: Volvo S60 R will not

Pull the immobilizer fuse.wait one minute then reinstall.This only works 75% of the time.

Posted on Mar 22, 2010

johnjohn2
  • 5763 Answers

SOURCE: driving no problem suddenly car shuts down after

I would check the ignition switch and also try a diffrent key, the antitheft may be kicking in, ive had a few of these with bad computers, the dealer should of given a better answer than that, i would start with the ignition switch but not the key part i mean the electrical ignition switch.theres also a tsb on the antitheft system, theres a problem with thee ignition lock, you will need to have the system checked i would taje it to another dealer as you will need a scan tool to check. hope this helps.

Posted on Nov 29, 2010

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