All these lights came on in my mom’s Highlander… any ideas?

Thanos said:

Keegan said:
Is it Christmas already?

Nah, Toyotas know when it’s “too early” :christmas_tree:

Lol, you say that, but here you are asking what all the warning lights mean.

Basically, it’s saying, “Take me to a mechanic!”

Sounds like: Door open, Check Engine, Traction Control off, and maybe time for a Virtual Safety Car!

Those lights together could mean an ECU issue. Definitely worth the $20 for an OBDII reader.

Might be the battery—get it checked at a parts store. If it’s not the battery, they can scan it for codes while you’re there.

Could be anything. Older Toyotas sometimes throw all the lights at once just to get you to the shop. Get the codes read—can’t know anything for sure without that.

On my ‘05 Highlander, all those lights came on when I had a misfire, which led to spark plugs needing to be replaced. Also found a radiator issue and later a head gasket problem. Best to get it checked!

Might be a wheel bearing or an O2 sensor.

  1. Door might be open.
  2. Check Engine Light.
  3. TRACtion Control off.
  4. VSC, Vehicle Stability Control. You can read more about it here:

Are you turning the key to the ON position without actually starting the engine?

Our ‘05 xB shows those same lights all the time (VSC, TRAC Off, and Check Engine). Not a big deal for us, but better safe than sorry.

Use an OBD scanner, AutoZone does it free. My money is on an O2 sensor. Had similar issues with my Highlander and RAV4.

These lights are pretty common, especially if a door is open.

Check the gas cap. Sometimes it just needs an emissions-type gas cap replacement.

Gas cap might not be fully tightened.

Maybe just try closing all the doors?

Could be the catalytic converter.

Could be a fuse. Sometimes companies use fuses that don’t last forever, so if you don’t find anything with a code reader, it might just be a fuse or relay, which are cheap and easy to replace.

Mine did this too. Turned out to be a misfire on cylinder 6. I changed the spark plugs, and it’s fine now. Could be a lot of things, though.

When this happened to me, it was a lean code. My fuel injectors were clogged with oil, so the engine wasn’t getting enough fuel. Those three lights together usually put the car in limp mode. An OBD reading should help narrow it down.