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Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #

Posted by Chris Jackson on June 12, 2012, 8:23 am

Year of Manufacture *: 2006
Engine Size and Code *: 2.0

HI

This vehicle came in the other day suddenly would not start for customer.car wont crank but permanent fault codes stored. in engine ecu we have P1621 immobilizer code words do not match. In instrument cluster b2139 the pcm identification was not recognized by pats module, u1900 can communication error. Checked that keys are coded to vehicle.cant find much info on these codes, hoping someone has seen these codes before.

All replies welcome

Thanks Chris

Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #

Posted by Mark Carter <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on June 12, 2012, 10:46 pm, in reply to "Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #"

What is the history of the vehicle?

P1621 What have you done with regard to this code?

Mark

Modern cars, Its all wizardry and witchcraft

Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #

Posted by Chris Jackson on June 13, 2012, 1:16 am, in reply to "Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #"
Message modified by board administrator June 14, 2012, 12:14 pm

Hi

The history of the vehicle is it was working fine for customer then suddenly would not start no intermitant faults before, then towed to us. Not replaced any parts yet. Nothing that stand s out in live data just the fault codes for matching / coding. Not sure if it's the PCM or instrument cluster that's at fault??

Thanks for your reply chris

Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #

Posted by Dean Birch <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2942' width='330' height='300' border=0 style='border:none;'> on June 13, 2012, 8:11 pm, in reply to "Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #"

Hi

These later Fords are hyper -sensitive to battery voltage .
Sometime's a disconnect for a couple of minutes clear's the faults you describe ,I would start testing the battery.

Good luck

Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #

Posted by Mark Carter <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on June 14, 2012, 9:27 am, in reply to "Re: Ford Focus 2.0 2006 - Will not crank, immobilizer codes P1621, B2139 & U1900 #"
Mark Carter

I belive you will have to re match the modules via IDS.

Mark

Modern cars, Its all wizardry and witchcraft

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