2003 Honda Accord cranks but won’t start, green key blinks?

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May 8, 2025 at 7:05 pm #677 Reply
Lee
Blinking green key on dash of car (2003 Honda Accord) won’t start but will crank.

Used starting fluid will turn over for a split second and turn back off.

Backstory / I bought the car fixed it up put new parts on it changed the oil battery and key battery’s along with the charcoal canister for evap…

I didn’t want to drive it in the winter, so I parked it.

Well it was a decent day outside, and I tried to start it and I have had this blinking green key flashing I’ve tried to unhook the battery a few times charged it also, checked my fuses only fuse I found bad was a accessories 12v for the cigarette charger thing switched a few fuses around that wasn’t it.

I’m getting absolutely no codes reset the engine codes that didn’t work.
May 8, 2025 at 7:09 pm #678 Reply
Christian
Multiple funtiom relay under the dash. It’s 80 bucks at O’Reillys.
May 8, 2025 at 7:09 pm #679 Reply
Bill
Immobilizer. Needs a new key, or reprogrammed if Honda key. Had the same issue with my 2014 Honda Accord. The car was sold to me with an aftermarket key that shorty had issues with the immobilizer, so I had to take it to Honda Dealership, and they got me a new key for about $100.
May 8, 2025 at 7:10 pm #680 Reply
Chris
I had this same problem with my 02 cavalier, it’s likely the immobilizer or it’s not reading your key properly.
May 8, 2025 at 7:10 pm #681 Reply
Wyatt
Key light means security fault generally.
May 8, 2025 at 7:10 pm #682 Reply
Mike
It’s a security issue. You may need to replace the ignition and key, or have a new key made onsite.
May 8, 2025 at 7:10 pm #683 Reply
Ande
Probably needs to have the key reprogrammed as it’s a computer error with it not connecting.
May 8, 2025 at 7:10 pm #684 Reply
Jesse
There is a weird cheat code with the ignition and the brake pedal that bypasses it if I remember right. Try to Google it.
May 8, 2025 at 7:11 pm #685 Reply
Stacey
I had a 2001 Civic that did this exact same thing. The immobilizer went bad. The immobilizer disables the fuel pump, which is why it cranks but won’t start. I ended up having to have mine towed to the dealership to be fixed.
May 8, 2025 at 7:11 pm #686 Reply
Jesse
Are you reading security codes or just engine codes, does the key fob (buttons on the key) actually work. Could be as simple as a dead battery in the fob. Could be as expensive as a dead security module. Need to see the stored codes in the security module.
May 8, 2025 at 7:11 pm #687 Reply
Heather
Oh that’s what it is… It clearly looked like something phallic to me.
May 8, 2025 at 7:11 pm #688 Reply
John
As others have suggested, the flashing green key indicates that the vehicle’s security system (aka immobilizer) is preventing the car from starting. Reading the relevant trouble codes will give you some information as to why. If you have other keys, try them.
May 8, 2025 at 7:12 pm #689 Reply
John
Are you using the original key? Seems like the car can’t read the chip in the key. I see this a lot with spare keys, or if the key broke somehow and someone only has the metal bottom part
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2003 Honda Accord cranks but won’t start, green key blinks?

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