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Anonymous Posted on Mar 02, 2013

What is code B2799 - 2007 Lexus ES 350

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ROBERT GARCIA

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  • Lexus Master 926 Answers
  • Posted on May 08, 2017
ROBERT GARCIA
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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)

  • marlon gonzaga
    marlon gonzaga May 17, 2017

    thanks for the info,its really appriciated

  • ROBERT GARCIA
    ROBERT GARCIA May 17, 2017

    thank you

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1helpful
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Toyota 2007 Camry issue starting, diagnostic run and code P0102 and B2799

P0102

& B2799 no engine told and is engine problems. of 3.
2.4 gas and 2.4 electric gas/hybrid! and 3.5L V6 ?????????????
no vin told, the 8th digit (usa) is engine code, learn to share that.

so the starter motor spins fast and engine too spin but will not start.?
the word turns over , means zero in the real world.
the starter spins, (turns) the crank shaft turns (if lucky spins) and the engine starts and runs and stays running. a serial process that./
worse yet?
other say turns means engine runs
turns over means ZERO to me.
.
or
cranks fast? but will not start? or runs for 1 to 10 seconds and stalls.

try to know we are blind and deaf here, we can not hear you turn the to start via key, and matters huge. this.

you put in a new battery and all I can do is scratch my head.
and think gee your starter was dead?. starter motor dead.
or not charged up.<<bet this I do. (blind)


P0102 MAF reads low, ( means weak and when weak engine power will be WEAK) the error means really SUPER WEAK or dead even.. or starter + battery weak causes fails error.

& B2799 IMMO errors
RULE #1 is:
to fix any cars even DIY the cars battery must be kept fully charged using a tool of same name a battery charger on any engine
that fails to start and or Alternator is dead.
must.
or the computers on board lie to you , with weak battery for sure cranking down and draining the battery too low.

b2799

Error in communication between hybrid vehicle control ECU and ID code box...

so is is the Hybrid car and you never told that.
wow not good for you and getting wrong answers and guessing
wrong.

B2799 is also listed as IMMO comm errors max.

my guess you keep cranking the dead engine
and the computers on board tell you lies

RECAP
no engine told. not one clue
not told if starter motor (cranking) is dead, weak slow or you cranked the dead engines battery flat

tow the car to a real shop.
they will charge the battery first and load test it
then crank the engine. and see if it starts.

OK what to do now. besides tow to shop
check call fuses.
charge the battery 100% and keep it charged or you will not make progress fast. OR NEVER.
TURN (THE ENGINE/START/STOP BUTTON DEAD?
LOOK AT THE DASH CLUSTER AND IMMO LAMP
kEY NOT DETECTED.?
THE IMMO LAMP MUST BE HAPPY(GLOW)
IF IMMO FAILS USE THE 2ND KEY TOY GAVE YOU DAY1 NEW
YOU HAVE 2 KEYS, UNLESS YOU LOST THE 2ND
OK IMMO HAPPY
TURN THE KEY TO START, AND CRANK THE ENGINE
IF WILL NOT START ADD 5% (A TAD) RIGHT FOOT THROTTLE
STARTS NOW?
IMMO ON THE CAR IS A MESSAGE BOX, ERROR
"KEY NOT DETECTED"
CAR HAS PUSH BUTTON START OPTION?
DO NOT HAVE BOTH KEYS IN THE CAR AT THE SAME TIME.
THIS CAR HAS 2 KINDS OF START SYSEMS
KEY OR KEYLESS.
THE LATER IS PASSIVE KEY FOB. ONLY
AND HERE ARE THE IMMO RULES IN YOU MANUAL

PAGE 19

https://assets.sia.toyota.com/publications/en/om-s/OM33748U/pdf/OM33748U.pdf


19-undefined-undefined-0_0.jpg see the IMMO lamp up top. see the car body ICON with KEY symbol there. this lamp must not act wrong/
if does , this must be solved first.
IMMO means IMMOBLIZED.
the smart key , uses display message. no key detected
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1answer

I have a car that is giving me a challenge ,Toyota corrola 2011 model.when you start the car it wil start and off immediately and when I scan it I got a code p1604 and b2799.pls I need a help

It appears it does not recognize your ignition key as valid. Make sure you have no other transponder keys near the one you are using.
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I have trouble code for land cruiser 2007 model b2779 error code

please look at the link below

http://www.fixya.com/answer/answerpageslideview.aspx?ctg=231&fml=0&brd=0&thid=25725903
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TOYOTA INNOVA TROUBLE CODE B2799 NOT DELETE FACING STARTING PROBLEM, PLZ SUGGEST

My toyota innova is not starting, no current is coming. scanner shows B2799 code. pls help me resolve this issues
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Code b2799

Hello I happened to me a problem in my car check in the computer system and Dahr me On B2799 So how fittest Alco possible Chrahola Hza case and thank
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Toyota code b2799

B2799 Engine Immobiliser System Malfunction 9

It has to do with theft deterrent/keyless entry/engine immobliser.

http://share.qclt.com/%E4%B8%B0%E7%94%B0Toyota%20RAV4%20Repair%20Manual/Engine%20Immobiliser/Engine%20Immobiliser%20System/045009.pdf


http://alflash.com.ua/OBDII/DTCe1.pdf

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