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

Colin Stickland

• 22516 Answers
• Posted on Nov 13, 2008

SOURCE: 2001 Volvo S60 2.4 won't start

volvo only to release immobliser

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.

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.

SOURCE: Volvo S60 R will not

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

Johnny Brown

• 5763 Answers
• Posted on Nov 29, 2010

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.