Question about Mercedes C-Class Exterior Pillar Posts Trim Set

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Ignition problem - serial communication link

Its very complicated problem that ive been trying to fix for the last 2 months ... when i turn the key all the way in the ignition the car start and drives normally but everything inside the car does not function , BUT when i turn the key a quick turn the car start and runs great and everything inside functions normally, the check engine light is on throwing the code " serial communication link "

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ivan whisker

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Sounds like a dodgey ignition switch or dodgey key fob as they need to read each other to work

Posted on Feb 22, 2014

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5 Answers

I cant start the car the key wont turn in ignition


Last time i had this problem, my car wasnt all the way in park, so what i would try is:
1: apply the break
2: push up on the gear shift, to make sure its in park.( if you can move the gear out of park, move it all the way to drive 2, then back to park.
3: try the key again

26250494-sn3cswl1paqsc2zwwnfeq0vf-3-0.jpg

Aug 01, 2016 | 1995-1996 Saab 900s Convertible Top Cover

1 Answer

2000 Pontiac Grand Am SE security system wont let car start


first most GM OEM systems will need to recognize the key first and foremost ,to do that you will need to roll window down on driver door,turn the key to the run position and with engine NOT running leave the key on for 10 minutes exactly ..then turn ignition off then try to start engine. if original system is working engine should start normally

Mar 26, 2017 | Cars & Trucks

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Wife used cig lighter adapter last night to blow up air mattress this morning new battery less than 1 month old wont start car. charged battery now when i turn the ignition key to start car the car alarm...


turn the igntion on, don't start, let it set for ten minutes Turn it off for 5 seconds then try to start it. If it lost memory for some reason and doesn't start . then do this three times , after the third time start it. that is the relearn procedure. Have a charger on it for the 30 minute relearn. Relearn is on for ten m off five s on ten off five on ten off five then start

Jul 02, 2011 | Chevrolet Lumina Cars & Trucks

1 Answer

My car; 1998 audi A6 quattro 2.8 won't start. Some checked and told me its my key that expired. I started observing that sometimes after a drive, when i park the car it won't start when i attempt to...


Guys hope yourl keeping well

Ive got a 1998 A6 2.8 Quattro
Ive changed the gearbox and the vehicle dont start now.
the engine swings from the starter but when using the key it turns once and nothing happens thereafter the key is locked in on position where im getting ignition lights

Can anyone help???

Sep 14, 2010 | 1998 Audi A6

1 Answer

Chevy cavalier wont start randomly! makes one click and a humm sound my lights come on the radio comes on but the car just wont start, ive had battery replaced along with the ignition switch, fuel pump,...


Ok then, from your description and the
make/model/year of the car you have there,
it appears you've reset the VATS.

The car's security immobilizer
reader at the key switch
does not recognize the coded
chip in the ignition key any longer.

You can try to put the key
in the ignition, turn to the on position &
wait at least 10 min like that.
(Do not turn off the key switch before
10 minutes as elapsed!)

Once done, the key is re-programmed and
should allow the fuel injectors to work again.
The car would start now if corrected.

In some cases, the VATS (GM'S VEHICLE ANTI THEFT SYSTEM)
will re learn the code this way, and will then
allow the restart, however if this does not work,
then you can simply tow it to any GM vehicle dealer
to have the service department re code it.

There is a permanent solution though.
Adding the PLJX Self learning Bypass module (59.95)
will bypass the PASSLOCK system in your vehicle
for good. See this at www.PASSLOCK2.com

Good luck I hope method 1 does the trick!

Here is the 30 min relearn:

Ignition keys relearn takes about 30 min to do. 30-Minute Learn Procedure 1. Turn ON the ignition, with the engine OFF. 2. Attempt to start the engine, then release the key to ON; the vehicle will not start. 3. Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF. 4. Turn OFF the ignition switch, and wait 5 seconds. 5. Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK Important: Turn the Ignition Switch OFF. The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle. 6. Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password. 7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles. Without a scan tool you may have momentary starter interruptions while history clears itself.

Dec 22, 2009 | 2003 Chevrolet Cavalier

1 Answer

Turning ignition key there is silence....battery is ok as lights, radio come on strong. I keep trying, turning the key and moving gear shift et...and maybe it finally connects and engin fires and starts...


When this happens and the key is in the Ignition position, do the dash lights, etc come on? Could be the ignition switch is bad, and this is and easy way to tell. If the ignition is on and when we go to START, nothing happens, I would replace the starter/solenoid next.

Oct 19, 2009 | 1998 Cadillac Seville

2 Answers

Car wont start, will not reset, security light always on


try locking and unlocking the drivers door with the key. [sometimes if you reach to un lock door through window it it sets off security]

May 15, 2009 | 2003 Oldsmobile Alero

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