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Diagnostic trouble code

U2105 lost communication with ecm buick lacross 3.6l car wont start

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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Posted on Jan 02, 2017

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deathraider
  • 64 Answers

SOURCE: key will not start my 95 buick park avenue

does your key have a chip on it ? if it does , the problem is going to be that ,key chip only works with the original computer , until you have it reprogrammed by the dealer . this is an anti theft function to keep someone from stealing your car . there fore your car will not start until the chip matches the ecm.

Posted on Dec 08, 2008

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roedmondson
  • 68 Answers

SOURCE: Auto Diagnostic Trouble Code

cORRECT. tHIS CODE DOES DEALs With emmissions. P1400 deals with the EGR valve. In case u are not aware, EGR stands for Exhaust Gas Re-circulation. What really this valve does is that it re-cycles some of the exhaust gases into the cylinder for combustion. The EGR valve might be blocked or has malfunctioned. It is advised that this valve changed or consult with a mechanic who is knowledgeable about this technology. a malfunctioned/dis-abled EGR system will cause the car to fail an emissions test, and may cause the EGR passages in the cylinder head and intake manifold to become blocked with carbon deposits, necessitating extensive engine disassembly for cleaning. So it is advised that u repair this ASAP

Posted on Jan 19, 2009

alicantecoli
  • 22219 Answers

SOURCE: dim headlights on 2006 buick lacrosse

check the earth wire first,wattage on the bulbs in case their wrong or old type bulbs ,check supply voltage ,if all ok then fit aux spot lights .if still having a problem have eyes checked as over 40 the old peepers can deteriorate ,dont know the name of it but it can affect some people at a younger age than others,glasses will not correct this problem.

Posted on Feb 13, 2009

  • 6 Answers

SOURCE: My remote won't start my 2005 Buick LaCross. I

Both my remotes no longer work. I will be ordering new ones off Ebay and having my dealer program them. New ones from Buick are very pricey.

Posted on Oct 20, 2009

judd0081
  • 334 Answers

SOURCE: I own a 1996 buick

It's when the security light starts flashing that the infamous "chip" in the key becomes a nightmare to many. Gradually the car begins not cranking anymore or if it cranks it would start and die in a second. Randomly it will do this more and more often until it won't start anymore. VATS, PASSkey and Passlock immobilizer systems are killing cars all over North America, they have a short lifespan and are certainly more effective against owners than thieves. Here is how you save your car
1st trick, Try a spare key that is newer or used less. The pins wear down and so do the keys causing security fail. 2nd trick, (if not starting) turn the key forward 2 clicks till right before it would normally start, leave like that for 10 minutes. ( no less ) After 10 minutes, turn key back then forward and your car might start. I did this in my regal for more than a year. If its shutting down while running, im sorry i have no quick fix... If anything on this page helps you, please remember to comment or give me a thumbs up on the myfixya sight so i can have a better rating to help more people on this. Thanks

Cheap fix: Bypass the chip in your key. Temporary, but effective. Until the TDM (theft deterrent module) in the dash poops out, then you're kinda screwed. I was told that these types of key security systems have a 7-10 year life span. Sucks for us. This link explains the "Key Issue" pretty well.
----- http://vats.likeabigdog.com/


Never worry again fix: Bypass the whole VATS/Passlock/passkey I or passkey II system entirely. Literally take it out, and throw it away. I just did this in my Regal. Took about an hour. Took longer to find the thing than it did to fix the problem. They sell a unit for 200 bucks to totally bypass this system FOREVER. life time-money back and all that. Finally did this in my car. Well worth the 200 if you've looked into getting this replaced... Anywhere from 600-1000 bucks. If you do buy this, please purchase it thru this link. The cost is the same, but i get credit for the sale and im trying to earn my money back, as you will be able to do if you buy fron NewRockies and join the free affiliate program. Thanks
----- http://newrockies.ca?ap_id=judd0081 ----- With this fix, you can take that whole Vats, passlock, passkey system out of your car all together. Good info on both sites.

It works for:
Any GM or Isuzu Vehicle with VATS or PASSKey or PASSLock security systems.
If your car has the chip in the key or in the lock cylinder, then you can save it with this Full Bypass.
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Posted on Feb 23, 2011

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I have a 2007 Buick LaCrosse we have changed the transmission and after installation of the transmission the engine will only start for a few seconds then go dead then you have the message illuminated that...


Checking the data line the scan tool use to communicate with the PCM would be the first thing to do . Do you know what a class 2 serial data communication network is ? Is there B+ voltage at pin #16 at the DLC ? If you had a professional type scan tool that could communicate with all modules on the vehicle you probably would find a U code stored in one of the other modules ,this would point you in the right diagnostic direction . It won't stay running because the PCM is not able to read the fuel enable message from the BCM or the theft module . Which ever controls the anti-theft system .
012 GM Class II Communications

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Is there a way to check the computer module on a 2003 Buick rendezvoous


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How to fix 2010 Buick Lacrosse stabilitrak?


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I replaced the transmission in a 2006 buick lucerne. no problem until I went to start the car . no start no communicaion with computer


Quite likely the on-board ECM needs telling the transmission has been changed or there is a fault in the new transmission.

It probably needs dedicated diagnostic equipment.

Feb 28, 2015 | 2006 Buick Lucerne

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What can I do when I got code u2105 in my car (Opel Astra 1600)


year, country?
this is covered in the factory service manual, "FSM".
for each code , there is a page, that tells you/ mech.
what the test is, what it does, how to do sub tests to isolate true cause.
my guess is the U code is in the cluster display?
best is to get a full scan of the car, OBD2 (EOBD?) to see all errors, all DTC. errors. then have all the facts, on errors.
lots of opel,, my guess 2007?
http://en.wikipedia.org/wiki/Opel_Astra
CAN Bus Error ECM
best i can do (no cars here usa) is above. google searching in Germany.
the car has many computer modules and one can not
communicate to the ecm(ECU/PCM) OR BCM.
is the car battery low>?
check all fuses. in car, in all fuse boxes, test them.

this is the best i can do ,no books on opel here.







Jan 03, 2015 | 2007 Opel Astra 1.6

1 Answer

Code u2100- u2105


U2100 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Off (4L30-E Transmission) Conditions
Cause Key on and the TCM detected a loss of communication on either Communication Area Network (CAN) Bus line for one second

--------
U2103 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Reset Counter Overrun (4L30-E Transmission)
Cause Key on and then the TCM detected a loss of communication on either CAN Bus line that exceeded 40 time out requirements


---------------
U2104 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Reset Counter Overrun (4L30-E Transmission)
Cause Key on and then the TCM detected a loss of communication on either CAN Bus line that exceeded 40 time out requirements
------------------
U2105 - GM Type Network - Manufacturer Controlled DTC - Manufacturer Controlled Description CAN Bus Error ECM (4L30-E Transmission) Conditions
Cause Key on and the TCM did not receive ECM messages for 1 second

BUT, THERE IS NO FAULT CODES RESULT FOR U2101 AND U2102
or you can ask the 24 hrs live technical support was multi-diag, they will like to help you, good luck

Aug 14, 2013 | 2005 Isuzu Ascender

1 Answer

What is code B2799


This Diagnostic Trouble Code (DTC) is output when the Engine Control Module (ECM) detects errors in communication between the Transponder Key Electronic Control Unit (ECU) assembly and the ECM, or in the communication lines. This DTC is also output when an engine start is attempted while the ECU communication ID between the transponder key ECU assembly and the ECM is different.
Possible causes Faulty Key Faulty transponder key amplifier Faulty Transponder Key Electronic Control Unit (ECU) Transponder key amplifier wire harness Faulty Engine Control Module (ECM)

Mar 02, 2013 | 2007 Lexus ES 350

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