Skip the auto shop - Our mechanics make house calls

Q: Engine light is on+ VSC Trac lights

asked by on

I own a 2005 Toyota 4Runner sport edition.for the past 3 month I've been traveling across the country towing a 4000 Ibs travel trailer.Ive had installed a brake system in my car to control the brakes better and to ease all this weight off my car brakes pads. The car is running great.the only thing is the engine brake light is on and also the VSC Trac lights. I need to get the car troughs emission test,and as they told me,it will fail because of the engine light is on. I've read a lot of reviews that says it could be the gas cap,and I know I should do coad diagnostic,but only the diagnostic check cost a lot.how could I illuminate what's causing the problem?the car is running real good,I think there is something loose with the electricity,and I don't know anyone reliable that I can talk to and make sure no one will make me do unnecessary work that could cost me more then it should be or make more damage. What should I do?

My car has 160 miles.
My car has an automatic transmission.

The "VSC Trac light on" problem is related to a software problem with the yaw rate sensors calibration. This is documented in Toyota Technical Service Bulletin TSB #BR005-03, which your Toyota service center can apply to re-calibrate this sensor. [Note: There are also a number of threads on the Internet for the competent DIYr to reset this yourself.] Most auto parts stores will read your problem codes (Check Engine light on) for free on a "time-available basis". This will guide you to the specific problems that are preventing a "Pass" on your emissions testing. If this service is unavailable to you, I would recommend having YourMechanic perform a Check Engine light diagnosis for these issues, provide an accurate assessment of damage, and estimate the cost of repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Engine light is on+ VSC Trac lights

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Dan, Need to know the following estimates on when to replace Drive Belt and Brake Fluid

For the 2012 4Runner, based on the normal service maintenance schedule Toyota recommends that the brake fluid be replaced every 30,000 miles. Modern serpentine belts are generally good for at least 100,000 miles. Toyota does not have a replacement recommendation...

Q: Funny rotten egg smell inside the car.

This may be related to the inside cabin filter. As you may know, your car has a cabin filter that works much like the engine air filter for your car does. As the air vents circulate air in from the...

Q: My car turns in but doesn't accelerate if so once it goes up when u let it go down would never come back up but stays idled

This may be related to what is called a throttle position sensor. This is a sensor that monitors the position of your foot on the gas pedal relative to the amount of fuel that the engine is being provided. When...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...