Key reprogramming 2005 honda civic ex, replaced ignition with used ignition. had new igntion key reprogrammed to car. reprogramming of key(s) successful. green key light will not go off with reprogrammed key and car will not crank. hooked back up original ignition (that has been taken apart due to key locked in switch, cranking with screwdriver), car cranks. What has happened with key program process, is there a step that has been missed?

Looks like he bent the ignition pins. Ignition will need to be replaced

if the ignition has a reader coil then it means the key is chipped. Then yes you must because your old key is coded to the immobiliser unit and ecu

Even with the reprogrammed key's the engine would crank, it might not start but it would crank over so that leave's only one thing, your used ignition switch is bad.

the IMMO light tells you , IMMO is failing,
this is covered in the FSM 100%


rule one , never buy a car with IMMO, baring that, buy the FSM.
this is a complex system, and is unique to this honda.
the book covers this.
see here, for your free book,
http://hondatech.info/downloads/Auto/Manuals/Civic/

i run DIY immo on all my cars and bikes.
costs $1 (and no leash to honda)
honda's do have idle learn modes, up the ying/yang.
1100 pages
your answers are on page 22-165 (FSM)
rule 1, one fob, 1 key on chain or fail.
step 2, does key inserted and on,show key flashing
yes, remove pin 7p and go to step 9
see, it dont work like you think
no 2 cars have the same system. its 2003 honda. and is unique.
7p is in the IGN switch.
etc,etc
and step 14, oops a bad e-parking brake switch , see lamp for same.

May be keyfob needs reprogramming to make it work line normal.

Keyfob remote reprogramming is not very difficult but on some cases it can be done by dealer service tools.

If the remote s faulty then key fob will not get programmed.

Insert the key in ignition. Turn the key to on position, and cycle the key three times off-on-off-on-off-on. Then with the key fob remote select your remote and then try to operate the vehicle with remote.

These are just the basic procedure, but sometimes it will not help.

On that case dealer is the only option.

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There is a related troubleshooting link mentioned below for remote key fob reprogramming. Click the link below to go through its details and procedure: -------

ANTITHEFT WILL NOT LET CAR TO START?

http://alltypesofpartsreplacing.blogspot.com/2012/12/keyfob-programming-reprogramming-car.html

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These will help.

Thanks.

Most likely the latch itself has failed. Open the door panel and first check to see if unlock signal is getting to latch connector. If yes, replace latch. If no signal, the problem is more likely in the control module.

sound like problem could be clutch start switch.or your new engine need to be reprogrammed to the ignition switch immobilizer module and ecm.

A new switch doesnt need a reprogram to work.

Best will be to remove the lock and take it to locksmith to cut a new key

no, you just need to ONLY replace the cylinder and if the new key has a chip in it get a copy made and use that one with your old master key held next to it to start the car.