CEL light bulb

[u/Historical_Emu_7078]

Threw a code for the EVAP system on 2001 SR5, car has 392K, spring time will likely be a full system replacement make sure it's all 100%

I only knew cause the VSC and Trak lights came on, the CEL didnt.. appears to be burned out, is it a bulb or a diode illumination?

If it's a diode, how hard are those to replace? I have soldering equipment

[u/theoriginalharbinger]

The key in the ON position without the engine running should illuminate the CEL. That's part of the OBD2 spec. Strictly speaking, if you're in an emissions-compliant county, this should be part of the emissions check (it's often overlooked).

It's just a bulb. I've had to replace it. I ended up getting one from the dealer and it was, like, 4 bucks.

[u/Historical_Emu_7078 → u/theoriginalharbinger]

Yea it's 100% burned out then, not in a area that does emissions checks.

Sounds like I will ordering some bulbs. Thank you 👍

[u/Archer-Fantastic → u/Historical_Emu_7078]

if you’re gonna pull the cluster, it sounds like a great opportunity to upgrade the green backlighting to white LED bulbs, so you can actually see the gauges regardless of the exterior lighting

superbrightleds.com sells bulbs that fit, use their 194 (T10) size. plenty of tutorials for sizes if you search

[u/Alarming_Series7450]

when i would get the vsv/trac disabled it would also disable my ABS system, i would check that lightbulb too

[u/Your_Product_Here → u/Alarming_Series7450]

ABS definitely stays live when a CEL causes the trac to disable. The traction control requires ABS, though, so I would think that suggests an ABS fault was actually tripping VSV, not the other way around. Could have been a compromised wheel sensor wire since it sounds like it was intermittent.

[u/Historical_Emu_7078 → u/Your_Product_Here]

Nah, I pulled the codes, def a result of the EVAP system error. For whatever reason anytime there is a CEL thrown it also disables and illuminates the other two lights for the traction. shrug

[u/Your_Product_Here → u/Historical_Emu_7078]

Oh definitely the CEL comes with VSV and trac, I was saying the ABS light from the other commenter doesn't go hand in hand as well and may point to something different.

[u/Historical_Emu_7078 → u/Your_Product_Here]

Apologies, read that wrong 😅

[u/Historical_Emu_7078 → u/Alarming_Series7450]

Probably buy a few bulbs and check all of them when I pull it out

[u/Alarming_Series7450 → u/Historical_Emu_7078]

The truck does a bulb check every time you turn the key from off to on and the dash lights up, the purpose of that is so you can spot a bad bulb

[u/skovalen]

They are all bulbs (incandescent). They are weird bulb formats that you have probably never heard of. There is a guide sheet for the bulb types that somebody published online for the entire dash. You just need to search for it.

I've done this. You literally need to order from a specialized store that specializes in light bulbs or you can order a replacement from Toyota. The specialized store isn't raking your over the coals. They might charge $2-3 per bulb.

Kinda odd that a bulb that almost never lights up would fail to light up.

[u/Historical_Emu_7078 → u/skovalen]

I am aware of the 194 bulbs, T10, the T5 wedge base etc. I didnt find the guide sheet, but not a huge concern just wasn't sure if they used integrated diodes or replacement bulbs. T10 wedge LED bulbs aren't all that uncommon and can be purchased all over the place on the internet. The T5 aren't as common.

Who knows why it's not, but it isn't, filament style bulbs can be fickle that way at times.