How to Troubleshoot Lexus RX 350 Check Engine Light and TRAC OFF Issues

Contents of the material

What does check engine light mean in Lexus?

Lexus check engine light means that the system On-board diagnostics (OBD) detected a problem . It could be something as simple as free gas cap or a more serious problem such as bad VVT solenoid bad spark plugs, catalytic converter or even transmission problems.

The error code will be stored in the OBD computer and can be easily read using an OBD2 scanner. The trouble code can help you understand why your Lexus Check Engine Light comes on.

How to Read Lexus Check Engine Light

In this section, we will show you how to read Lexus check engine fault codes ( also called diagnostic trouble codes or DTCs ) using a standard OBD2 scanner.

  1. Locate the OBD2 port under the dashboard. Connect your OBD2 scanner.
  2. Turn on the ignition, but do not start the engine.
  3. Let your OBD2 scanner turn on and communicate with your Lexus.
  4. Select Read codes in the main menu.

Fault codes will be displayed on the OBD2 scanner, e.g. P0300 . Write down all the codes and do further research to understand what they mean and learn about possible causes. Once the problem is resolved, you need to reset the Lexus check engine light by going to the menu Clear codes .

Why is Lexus Trac Off/Check Engine Light? Common reasons

What happens behind the flickering Lexus Trac Off /Check engine light?

Infamous Reasons for Check Engine Check track included by Lexus, turn on Broken MAF sensors, loose gas caps, bad oxygen sensors, spark plugs and catalytic converters .

Broken oxygen sensors

Even the air conditioning system will be destroyed during the process, causing TRAC and check Lexus engine light !

To fix or replace the sensors, go to any local repair shop in your area. The most expensive service in my city is only 200 bucks at best (both labor and parts counted).

However, those who are confident in their skills can save some money by doing the replacements themselves.

Buy the sensors online, then check the manual for detailed instructions and guidelines.

Faulty or loose gas caps

Your car suffers from reduced performance and efficiency, eventually losing all engine power!

The corrective tips are simple: inspect the lid.

  • If it is loose, tighten the cap and check the draft again to see if it has turned off.
  • If it is damaged, purchase replacements at auto parts stores for $5-10.

Failed catalytic converter

However, natural tearing and wear or severe collisions may push the device to its limit sooner than expected. Remind yourself to look for these symptoms:

  • Strange smells
  • Decreased performance
  • Reduced fuel efficiency

Unfortunately, repair costs are by no means cheap. Even the smallest person starts at $2,000.

And DIY substitutions to cut the charge are out of the question: unless you’re experienced yourself, it would be better to leave the job to trustworthy experts.

Faulty MAF (mass air flow) sensor

Worse, the sensors may even transmit inaccurate data due to this fault, leading to increased emissions, a sluggish car, and poor gas mileage.

The best thing reset MAF sensor or replace it (and remind yourself to do this at least twice a year!).

The only problem is the price – $200, Labor calculated. Luckily, there’s a way to reduce it a little: Have a technician perform other repairs while you replace the filters yourself at the store.

Problematic spark plugs

  • Failure to ignite plugs (or ignition system problem)
  • Cels/thrust off
  • Feelings soon during acceleration

However, if I had to stick with a lesser devil, I would prefer it to be the spark plugs. They are ridiculously cheap than other parts and very easy to remove.

Starting price is $10, and DIY replacements are completely within reach—thanks to tons training manuals in the Internet!

How to get rid of the “Trc OFF” error?

First you need to determine the reason why this error appeared. To solve the problem, follow these steps:

  1. Check to see if the system was turned off intentionally. Check for buttons or switches inside the vehicle that control TCS.
  2. Reboot your vehicle’s electronics. Rebooting often helps with short-term failures. Turn off the ignition, wait 5-10 minutes and turn it on again.
  3. Check the wheel sensors. They are responsible for transmitting speed data to the TCR. Make sure they are not damaged or dirty. If there are visible faults, repair or replace the elements.
  4. Check the brake system. Since the TCS works almost in tandem with the braking system, make sure there are no problems with the brakes.

And the most logical step is to undergo diagnostics at a service center. If the problem persists, contact technical center, where auto mechanics will conduct more detailed diagnostics. There 100% will be able to find the cause of the error and eliminate it.