Skip the auto shop - Our mechanics make house calls

Q: Mileage is incorrect, Check Engine Light is on, and the car shakes - 2004 Mitsubishi Galant

asked by on

Hi when I brought the car the mileage was 200,000 something. I recently got an oil change and noticed the mileage says 82,000. How is it possible for it to change like that? Also my service engine soon light is own and I was told it was the oxygen sensor which I have scheduled to have fixed by you guys this Sunday. I also know I need new tires and the car shakes when I start the car when I go over 60 mph. I read that it has to do with the tires and spark plugs. Which is more important to get fixed first?
My car has an automatic transmission.

A: Hello. The mileage may read this because it...

Hello. The mileage may read this because it may have been switched from kilometers to miles. As for the shaking, if it occurs more at higher speeds, then it is more than likely due to the tires and not the spark plugs. If the plugs were bad, you would get it more often at all speeds. If the tires need to be replaced, then that should be done before a tune up.

I recommend having one of YourMechanic’s certified technicians perform an inspection to determine why the car is shaking and why the Check Engine Light is on.

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!

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: Modify 4 speed transmission to 6 speed.

Unfortunately, undertaking a procedure such as converting an existing 4 speed transmission to a 6 speed transmission would be a task that may exceed the cost of the car to undertake. As you may know, your transmission is a complex...

Q: Transmission wont go into gear

Check to see if the transmission will engage in Low, 1, or 2. You can shift manually to those positions. If it does engage, that could signify a broken apply band (such would require rebuilding the transmission). If the transmission...

Q: My engine won't idle after replacing the fuel injectors.

This sounds like potentially a idle air control problem. There is a component called an idle air control valve that regulates the amount of air flow at idle. When this is not operating correctly, the engine will not idle as...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...