ABS and other lights came on? - Toyota FJ Cruiser Forum
Stereo / Electronics / Electrical If you have a topic that deals with the electronic components, stereo, etc. then post it in here.

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post #1 of 6 (permalink) Old 12-20-2018, 08:42 PM Thread Starter
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ABS and other lights came on?

I had 4 amber warning lights, one of them the ABS light, come on while driving. I stopped for gas and when I restarted, they were gone, but they came back.

Pic didn't come out all that great, sorry about that, but those are the ones that are on. 2007 FJ.

I have one of the Verizon Hum obd2 readers, and it's not showing me any alerts and in fact says everything is good to go. But warning lights make me think otherwise.

Any ideas? Or, any more info I can dig up? It's 38f outside and dark outside.
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post #2 of 6 (permalink) Old 12-20-2018, 08:50 PM
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Re: ABS and other lights came on?

Remove & replace your gas cap.


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post #3 of 6 (permalink) Old 12-21-2018, 03:19 AM
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Re: ABS and other lights came on?

I had the same thing. The lights came on and went off, from time to time, even with a new gas cap, and there were no codes when reading the OBDII.

From reading other threads on here I suspected by brake light switch (while those lights are on, back up to a wall, or a big window you can see your reflection in, and press your brake pedal several times in a row: do the lights come on every single time? I found out that mine didn't).

It took 2 minutes to replace with a new switch (amazingly simple, several threads on here describe it), and the trouble went away (now years later, still good).

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post #4 of 6 (permalink) Old 12-21-2018, 05:36 AM
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Re: ABS and other lights came on?

Get a good code reader, read the codes. If you don't have one, go to an auto parts store they often read the codes free of charge.

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post #5 of 6 (permalink) Old 12-22-2018, 02:10 PM
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Re: ABS and other lights came on?

Quote:
jrnichols previously said: View Post
I had 4 amber warning lights, one of them the ABS light, come on while driving. I stopped for gas and when I restarted, they were gone, but they came back.

Pic didn't come out all that great, sorry about that, but those are the ones that are on. 2007 FJ.

I have one of the Verizon Hum obd2 readers, and it's not showing me any alerts and in fact says everything is good to go. But warning lights make me think otherwise.

Any ideas? Or, any more info I can dig up? It's 38f outside and dark outside.
I just got my 08 back from the body shop. The Toyota shop spent nearly 3 months trying to figure out why those same lights came on. I have an OBD reader too, “Blue Driver” and there were 2 codes C1236 & C1223. I took it in after an accident and they had the body damage fixed in 2 weeks. The shop is next to a freeway and as I headed home after picking it up, those damn lights came on. I turned around and brought it back. I checked for the codes before I gave it to them. They would replace a sensor, and then a harness before they got a “master mechanic “ to look at it because the only thing left to replace was the brake module, a $2700 part. I got the car back in between each try. I could reset the alarms and the lights went out until I got to 7o mph, and they came back on, and oh, sometimes they would go out on their own as I came to a stop. I’m an engineer and I thought it was obvious that the problem had to be a moving part that vibrates over 70 mph. The master mechanic agreed with me and they replaced the wheel bearing that they already replaced! The lights are finally off! I learned in the process that there’s a big list of things that can trigger those lights, like a lose gas cap! I hope this helps. Contact Jimmiee on the forum, he can help you through it! Good Luck , and Merry Christmas!
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post #6 of 6 (permalink) Old 05-17-2019, 07:08 AM Thread Starter
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Re: ABS and other lights came on?

Bumping my own old thread in case a google search wanderer finds this..

it was simply a loose gas cap. *blush*
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