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View Full Version : Opel Vectra C 2005 key precode (PCF7946)


SuperMaks
22nd January, 2020, 01:14 PM
I bought blank flip key with 3 buttons from aliexpress. But I cant program it to the car.
So then, I went to a car service, where they finally programmed it to the car, but I have only working ignition without remote control. Thats all that they can do.

Then I decide to try precode the key by myself. I bought ZedBull programmer and few new blank ICs PCF7946. But all key dumps for keys that i found is not accepted by the car at all.

Can someone help me with this? Maybe I am doing something wrong or this is impossible to do with this tool.
Maybe you have working key dump for this car, no matter 2/3 buttons.
paul_12345
22nd January, 2020, 02:00 PM
Zed bull precode works ok your doing something wrong.
SuperMaks
22nd January, 2020, 02:49 PM
Yeah, I have tried this way to, and it dosnt work. Maybe cause I havent proper db. I have in db only Vectra 2002.
684093
P&D
22nd January, 2020, 06:12 PM
Go to Opel then choose PCF7946
SuperMaks
24th January, 2020, 05:00 PM
Just for sure that all clear, I have repeated the test. Transponder production/46/Opel/Vectra C 3 buttons... In the end Ive got the window - successfully programmed.

This time, the key was accepted by the car and programmed, but remote control steel dosnt work(. Thank you for your help.
What is the problem can be with remote control?
Manta1600
24th January, 2020, 05:23 PM
Are you sure that this car has working remote system?
SuperMaks
24th January, 2020, 06:05 PM
Are you sure that this car has working remote system?
Yeah, I have working original key with the working remote. PCBs of the both keys are the same and same ICs on them.
SuperMaks
24th January, 2020, 06:07 PM
Maybe Im so lucky and I have the fake transmitter IC...
jmautoman
26th January, 2020, 06:03 AM
Maybe Im so lucky and I have the fake transmitter IC...
Replace the PCF 7946 they often come damaged.. That should solve you problem with remote,,
szengen
26th January, 2020, 06:46 AM
not some keys from ali do not have pcf, buying cheap you have to take into account losses
P&D
26th January, 2020, 12:45 PM
most prob the china key
I only use originals with a replaced 7946 chip
they never fail
volorucinski
27th January, 2020, 12:09 PM
Hello, there is a bad pcb clone. I have had this problem with China remotes. Vectra C, Corsa D ect. Even vvdi could not reflash the pcf ic. Get another supplier with good rating on China sellers.
SuperMaks
16th February, 2020, 07:30 PM
I finally done with this key.
The problem was with transmitter. I have replaced mine IC TDK5100 with the new one from ali TDK5110 (it fully compatible and more powerful)