Trac Control and check engine light came on

Today my Trac Control and check engine light came on. Never been an issue before. Truck is stock with approx 40 K miles on it.

Anyone have any ideas as to the cause?

Thanks

 

What is the code?

 

I don't have a reader to get the code

 

Autozone and probably some others will pull the code for free.

 

We'd just be guessing, you need more info or take to a shop

 

Any time the CEL comes on, VSC is disabled, so it can be ignored until the CEL is checked.

The number of reasons the CEL could be one are >1000 - you need to check the code.

Jeff

 

Check gas cap?

 

For me even before I scan the cel on a car with low mileage, I ask if they recently filled up the gas tank and it ends up being a p0456 code or something like that for small evap leak or gross evap leak.

 

Loose gas cap

 

I checked the gas cap, filled the truckup several days ago and thr light is out now. Have to wait and see when I take it in next week.

 

You will still have too have the code pulled out of the computer.

 

Wheel speed sensor

 

Not sure if you're being serious.

 

Mercury is in retrograde. Of course it's the wheel speed sensor

 

I will provide the cause after my appointment on Tuesday am

 

There is an intermittent fault with the neutral sensor in the transmissiopn

 

gas cap will throw codes

yet gas cap throwing a TRACtion Control code ??????

 

If the logic system is anything like my Subaru used, any CEL code would also cause the traction control light to illuminate, cause the cruise control light to flash and also disable the cruise control.
On the Subaru, there was a built-in code reader. It was a little difficult to use because you had to go through the steps very fast, but:

With the car off and headlights off
turn the ignition on,
press the distance meter reset button 4 times,
turn the headlights on,
press the distance meter reset button 4 more times,
turn the headlights off,
press the distance meter reset button 4 more times
urn the headlights on,
press the distance meter reset button 4 more times . . . and then the CEL code(s) would show up on the odometer readout. Pressing the distance meter reset would toggle through the codes.

Maybe there's a similar process for Toyotas?

 

$28 ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

https://www.amazon.com/gp/product/B01G5EA74I/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Paid for it self on its first diagnosis.

Code + google of model/make/year = win

 

Not that I’ve heard of. Most just plug in a cheap OBD II Reader or App and read the code.

As far as the CEL & Trac lights coming-on together, I’ve seen that on other Toyota’s. I used to have a GF who had a 2000 Lexus ES which had a penchant for throwing emission codes which would cause both lights to come-on.