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[RileyRomius]

If you posted you location, there may be a local member willing to cast an eye over it first

I live down in plymouth 

[RileyRomius]

i had the same trouble light on dash flashing when trying to start and a member said check the key for the chip...and sure enough when the battery was changed chip was lost but had a spare key and all was ok.............but you say yours is in there and ok......you also say that you have checked with a code reader,was it a proper code reader or a cheapie one off the net....the reason I ask is the cheapie one I used would not read mine at all whereas the proper reader did the job ok..

Ah I see! Yeah it was a cheapie one off the net  what was the problem you had in the end and how did you fix it if you don't mind me asking?

[zirk]

I'm guessing from the above posts, that the  battery in your fob has failed. 

Renew the battery & hopefully the cental locking will work.

Do a reset  on the door locking by sitting in the car with ignition on II & press the locking button on the fob & all doors should lock & then unlock .

Remove key from ignition  . . . . then using the fob, operate locking again to lock ( you can do this from inside or outside the car)   . . .

Then operate to unlock  . . . then  put key back in ignition & it should start hopefully 

Had this happen on my last 2.6    but can't remember who advised this solution  . . . but it worked

Sounds crazy . .  . but worth a try 

The immobiliser and central locking/alarm are two entirely independent things (on post 1995 Omegas), each with their own ECU.  The fob is 100% purely for CL/Alarm, and plays no part in the immobiliser function. Therefore a flat/missing fob battery will not cause an immobiliser issue, though will set off alarm is you have to unlock/open car with mechanical key.

Hope that clarifies

Just thought this may be worth a try TB as it sorted my last 2.6 MV6 when this imobiliser problem occured.

I also understand your knowledge of this sort of thing is second to none  . .   but  . . .

It also worked and got  Toledodudes car  started when I instructed him over the phone ( although that one did go on to have a major ECU breakdown in the end )

I understand that the key fob battery has nothing to do with this but ..my point was that the OP cannot do a re set of central locking when the fob will not work.

Cure for mine was : ignition on  . . . press lock on fob  to re set  . .  doors lock & then unlock (re set )  then remove key . .

lock doors again with fob with key in your hand  . .  then open doors with fob in your hand .

then car started

As said sounds weird  . .  but it has worked on 2 cars to my knowledge.

For the life of me I cannot remember who on Oof suggested this 

Must be worth a try for the cost of a fob battery

Think it might have been me Al, suggested it a couple of times and its helped a few people out including one of mine and Alba's non starter.

As TB says, there's no direct connection between the Remote Fob and the Immobilizer, However, the Reset procedure (Key out, Lock Up and Unlock) sometimes works with an intermittent immobiliser issue. The reason being is once the immobiliser has thrown a fault ie, flashing light / no start, then the car will not start again, even if the immobiliser issue has been fixed or has returned to its normal state, without the system being reset. Key out, open / shut door, lockup, unlock, then try again.     

[powerslinky]

yes Chris , i think it was you 

Certainly worked on 2 cars with this problem  to my knowledge 

Think that TB  thought I was a loony suggesting it 

[TheBoy]

yes Chris , i think it was you 

Certainly worked on 2 cars with this problem  to my knowledge 

Think that TB  thought I was a loony suggesting it 

You're bigger than me, so you're never a loony

I am perplexed with your (and Zirk's) luck with this, as the immobiliser will immediately reset on next attempt of turning ign on.

[zirk]

yes Chris , i think it was you 

Certainly worked on 2 cars with this problem  to my knowledge 

Think that TB  thought I was a loony suggesting it 

You're bigger than me, so you're never a loony

I am perplexed with your (and Zirk's) luck with this, as the immobiliser will immediately reset on next attempt of turning ign on.

Thats the problem though TB it doesn't always seem to reset, well at least on the ones Ive checked (all post 2001 ODB2 ones by the way).

Not suggesting its a cure, but certainly worth a try, as that situation can through a Red Herring into the equation once the system has been triggered as a no start, and as said has certainly helped a few members out.

I found this out by accident, when I came across a couple of intermittent non starters, think I may have had more than one car keys on the same bunch which could have confused the Induction Loop Aerial. Then having spread the keys apart, then found you had to do a manual lockup / unlock reset for it to start again. I also come across this situation when only using the one key, ie a lazy or intermittent transponder issue.

Try it, next time you get bored, remove one of the transponders from a good set of paired keys, keeping the removed transponder and good key away from the Ing Barrel, so with the now faulty key, start the car, wont start obviously, then without doing anything, try the good key, my money is on it still wont start with the good key without doing the reset. Key out, open / shut door, lockup, unlock, then try again. 

[TheBoy]

Not suggesting its a cure, but certainly worth a try, as that situation can through a Red Herring into the equation once the system has been triggered as a no start, and as said has certainly helped a few members out.

As a cost-free, quick and easy procedure, certainly no harm in trying