fatboyq

so atleast once a day if not more for no reason while Im driving or stopping, sitting in traffic my cel light along with the trac light come on for like 2-3 seconds then go away what the heck is going on?

no ill symtoms or anything when this happens. Idle is perfect, new plugs, wires, seafoamed, t body cleaned etc all within 100 miles.

where should I start looking? Im not turning off the traction either when this happens.

it is annoying and a bit scary to see the cel light flash when your driving to work etc.

thanks

mkorsu

Well, the CEL and Trac light will go on together. Since yours flash on then off, I'm inclined to think it has something to do with the traction control and not the engine.

Have you tried to pull the code??

umasw84me

I had an issue like that on my 92 sc300. Mine was the O2 sensor.

5spdSC300

iTrader: (1)

Try to pull the codes. If there is any, you'll know where to start troubleshooting.

fatboyq

The lights don't stay on longer than 3 seconds at most. today it happened 2x on the drive in to work. Both lights flash in sync with each other for 2-3 seconds then go away and will not come on for a long time or if at all

if they stayed on then it might be easier to pull codes or get it diagnosed.

mkorsu

What year is your SC?

If you're OBDII, you could plug in a reader, drive around, and when it occurs it will be stored in the reader.

G Star

iTrader: (2)

replace your o2 sensor.

Take it to the shop and have them take a look at it & make sure.

fatboyq

95

I will take it in to a indy shop somewhere.

5spdSC300

iTrader: (1)

If your obdII, i believe you can go to a local autozone (if you guys have them there) and they will check the code for you for free. If its comming on and off, there is a good chance that the code is stored in the ecu. I wouldn't replace anything until you can confirm whats tripping the cel.

drft_n_sc

iTrader: (3)

The 95 sc300 are obd1. My old 95 used to have a similar problem. The TRAC light would come on and I would have to reset the relays. They look like giant fuses in your engine bay. There's 4 of them and 2 of them are for the TRAC. Check that and see if it helps. As far as the CEL, I'll check the service manual and see waht that means for you.

5spdSC300

iTrader: (1)

If its OBDI then its easy. Let us know if its throwing any codes.

http://www.troublecodes.net/Lexus/

O. L. T.

iTrader: (17)

good link!