What does it mean when the check engine light, trac control, and 4LO come on

30

Asked by Orval5 Apr 22, 2018 at 09:04 AM about the 2013 Toyota Tundra Platinum CrewMax 5.7L 4WD

Question type: Maintenance & Repair

Yesterday the check engine light and trac control light came on. Also the 4LO
light came on and is blinking.
I turned off the car and restarted it but it was still there. After leaving the truck
turned of for about 15-20 min, I started it back up, they were gone but
returned again about 2 hours later.
Any thoughts on what this may be?

13 Answers

17,670

First, check for the code(s) stored in the computer's memory, this will tell you the possible cause for this problem. No sense in replacing parts that may have nothing to do with the situation.

7 people found this helpful.
30

Thanks, Jorge. Is there a way of extracting the codes without taking it to a dealer?

17,670

Auto part stores can do that for free, but if you need to read transmission codes, then you will probably have to take the vehicle to a transmission shop. But try the free service first. And do not purchase any parts they want to sell you, unless you can do the job yourself or have someone that can double check the problem before start spending money.

4 people found this helpful.
30

Thank you Jorge. I will start there.

3 people found this helpful.
190

Most likely, it’s the secondary air injection pump.. or the secondary air control valve. My 2008 did the same... Mine went into limp mode because of it though.

19 people found this helpful.
230

My 2012 just started doing this exact same thing today. Engine Light, trac. control light came on. 4LO light is blinking. It also seems to be in limp mode as Keith said. Did you ever find what was the problem and get it resolved, Orval5?

23 people found this helpful.
210

I’m having the same issue on my 2008 Tundra (4LO flashing and several other indicators staying on-CEL, ABS, track control). I’ve been to the dealer and 2 mechanics and they are saying the same thing: secondary air injection pump(s) and/or the control valves. If you live in a state that doesn’t require emissions testing, search for “SAIC bypass kit). There’s also a chance you can get it repaired from a Recall at the dealer.

9 people found this helpful.
10

Same here on my 2010 tundra. One dealer on phone mentioned the air valve and said it was possibly under warranty but I took it to a closer dealer due to rollback bill and he said everything but the air valve, I’m still not so sure. Anyone figure this out? I do know at first oh can reset the codes by disconnecting he battery. It worked on mine for two weeks then cam back and now won’t reset or run over 5mph

1 people found this helpful.
160

My truck is doing this exact thing as of this morning. Not sure if I should drive it. It engages into 4HI but 4LO still flashes with Check Engine Light on and TRAC OFF light on. Help?!

16 people found this helpful.
210

2007-2013 Tundras have a Secondary Air Injection System (SAIC) that is probably causing the CEL, 4LO, ABS, and traction control to all light up at the same time. Search the internet for SAIC bypass kit or go to Hewitt Tech. I installed two different kits on my Tundra and the lights are gone after following the step by step instructions. Some of the install is a pain in the ... but it has worked for over 2 months now. Cost for both kits was $500. Get computer codes checked at parts store and call Hewitt Tech. Otherwise, take it to a mechanic and pay $2,000- $3,000.

12 people found this helpful.
30

I replace a fuel pump and fuel pump relay on a 2006 toyota tundra and still not starting. I towed it to Autozone to get it test and its not giving out and codes. The connection on the ECM are good. Why?

3 people found this helpful.
10

What does 150 code mean

1 people found this helpful.

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