P38A Invalid code...bugger found!fixed !

kermit_rr said:

Well, that's interesting. Had this discussion before and I've checked myself, once my engine is immobilised and the key has lost sync, I've not been able to disable the immobiliser or turn it off until the key syncs and re-mobilises the engine

Click to expand...

Mark Piercy said:

Wieird, mine will turn off with no problem. It's on a 99my what year is your @kermit_rr

Click to expand...

kermit_rr said:

Mines a 2000. Is your becm unlocked?

Click to expand...

kermit_rr said:

I'm going to have to try again now to see if i can get to the bottom of it. Something for next week once I've done my trackday

Click to expand...

Mark Piercy said:

Good evening peeps.
So, my fob is now not talking to the bus at all. It was at first every now and then it would turn its cheek...
In goes the nanocombles..
Becm section.
Cleared the rf memory and....
Poof.. Invalid code received.

The immobilizer is turned off and when I turned it back on the engine was immediately disabled.. Oooer panic... Immobilizer disabled and engine started phew...

I've done the key in door handle and pressed the appropriate buttons and no avail, also the key in the ignition with any of the buttons pressed.. 0
I did this with the immobilizer on and off to no effect.
I've tried the second fob and it's batteries are good also and nothing..
So. If it's the rf receiver then how does the car receive an invalid code or is it not receiving a code and interpretating it as an "invalid code"
It's over to your thoughts

Click to expand...

RangeRoller dt said:

your RF plugged in yes?

Click to expand...

Grrrrrr said:

Have you tried the manual way of syncing the key in the door?

Click to expand...

RangeRoller dt said:

Sometimes play up because the RF is unplugged, if I get any trouble 1st thing I do is plug RF back in but early ones are easier to deal with without passive coil.

Click to expand...

Mark Piercy said:

Track day? Err pictures are required or your a fibber
But keep me updated please kermy

Click to expand...

kermit_rr said:

View attachment 244580

Click to expand...

Grrrrrr said:

The passive coil is another possibility. Has the chip dropped out or is the coil acting up?

Click to expand...

kermit_rr said:

View attachment 244580

Click to expand...

Andy C said:

Simple test, from a simple person, is the red light on the fob coming on when you press the buttons? I have just seen where you are, so I won't bother with my next suggestion which is a guy who does new keys - unfortunately not the flick type - that he can make using your old key. He's just doing 2 for me as the latest P38 that I have bought had only one key and that didn't work, along with a shed load of other faults that were very well hidden, but coming to light now.

Click to expand...