PLEASE HELP MY TOYOTA TUNDRA WON'T START, THERE IS LIGHT FLASHING I THINK IS THA ALARM I WOULD LIKE TO KNOW WHAT I CAN DO TO STOP IT

remove remote start and clear the no start problem first.

https://www.justanswer.com/toyota/5do8v-toyota-tundra-sr5-2000-tundra-changed-battery.html

If it is the alarm, the light would stay lit up. Best to have a full scan, check history codes also. Many parts to the security.

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CarGurusfrustrated2000tundra asked a 2000 Toyota Tundra 2 Dr SR5 V8 4WD Standard Cab LB Maintenance ... My 2000 tundrasr5 4.7l 4x4 wont start! ... 2008 Toyota Tundra ...won't Start ... Report. rckwll asked a 2001 Toyota Tundra Maintenance & Repair question 2 months ago ... 2002 Toyota Tundra Turns Over But Will Not Start.

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CarGurusGet fast answers to your Toyota Tundra questions from experts in the CarGurus automotive ... My 2000 tundrasr5 4.7l 4x4 wont start! Thought wasn't getting fuel because tries to turn over but wont. ... Tundra Dead Battery, How Do I Open The Door Or Hood To Recharge? ... 4wd Hi Light Flashing, But Will Not Engage.

the IMMO light on,,,, the IMMOBILIZER, ever read the operators guide

Can not start car, that is because the security system is in ALARM
and that tells the IMMO not to allow starting, all by design.

the alarm system must be diagnosed,
the manual will show how the alarm is detecting a breach.
all cars, have tests to see what is in alarm.
look here.
alldata.com
see the security system checks.

Your truck is in limp mode because your fuel mixture sensor is bad, I think that toyota has put this part back under warranty because of so many problems

I am currently have the alarm going off on my 06 Tundra 7 and tried the recommendation above but didn't get rid of problem. I don't have keyless remote. There is a red light button on lower left of steering wheel & button underneath the dashboard under the steering column. Has anyone had a problem like mine that can give me specific instructions that will work for my. 2006 Tundra

Hello and welcome to FixYa!

As a first course of action, I strongly suggest that you remove the positive battery connector and let it sit for at least 5mins. before reconnecting it. This will reset the system and can get your vehicle back to it's normal operation.

Hope this helps and thank you for using FixYa! Have a good one!

I am having the same problem. Replaced ignithion swithc, starter relay. Battery is good, but alarm keeps going off, and will not crack the engine. Please help with any recommendations!!

Anytime the alarm sounds when opening the door with the key, get into the truck anyway, place the key into the ignition key switch and turn it on and off 2 times. The horn will stop blowing and the lights will stop flashing. You're ready to go.......

If after unlocking the driver door with the key and still no luck, put the key in the ignition and turn forward to start (if it won't start turn forward anyway) then push you're red reset button on the dash. That should do it.