Skip the auto shop - Our mechanics make house calls

Q: truck won't run at hight mph

asked by on

my trucks was marking me cat code for 2-3 months but i steal ran it and i changed a rear tire in emergency and from the it has been not running well i changes both cats and the check engine went away but steal runs the same

Hello. The rear tire change would not have anything to do with the operation of the catalytic converter. There is however a possibility that when the catalytic converter codes came up that this triggered other issues as a result of continuing to drive it.

As you may already know, the catalytic converter works to convert toxic exhaust gases to less harmful pollutants to dispel into the environment. When this is clogged and not working properly, this causes these gases to be backed up into the vehicle’s system not allowing it to properly release combustion gases. As a result, this can cause other problems which may have been the issue to begin with that originally caused the cat codes to show up. I would suggest having an expert from YourMechanic come to your home to diagnose the codes that showed up with a scan tool to download critical data and pinpoint the cause of the problem.

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. truck won't run at hight mph

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: Engine shuts down intermittently

This symptom sound like an issue with the mass air flow sensor sensor. The sensor is either dirty or oily. Remove the sensor and clean it with electrical cleaner. Then after it dries, put it on and retest the vehicle...

Q: Why is my car's rear tire area leaking fluid?

Hi. Your car is rear-wheel drive and the axles are in the rear differential. The axles have a seal and a bearing. The seal stops the differential fluid from getting on the brakes and rim. Your axle seal has broken,...

Q: My car ran hot and when i crunk it back up the car was making a light knocking noise that it has never done before is my motor bad

Hi there. It really depends on how much damage was done to your engine during the overheating situation that will determine whether the engine is beyond repair. The knocking sound can be caused by multiple components, from cylinder head hardware...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...