Skip the auto shop - Our mechanics make house calls

Q: rough shifting high idle

asked by on

my car is running very rough and also the transmission struggles to change gears i do have trouble codes 101 102 and 103 plus it stalls out at times

My car has 207000 miles.
My car has an automatic transmission.

A: Hello. This can be caused by a few differen...

Hello. This can be caused by a few different things. Most of the time it is caused by the needs for a tune-up or a fuel system problem. Both of these will cause the car to run this way. I usually scan the computer further for codes and check the sensor readings to see if any of them are reading incorrectly. I also pull a few of the spark plugs to see if it needs a tune up.

If all of that checks out fine then I check the fuel pressure. It is also possible that the transmission may be a secondary issue so that may need to be checked also. If you want to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your Check Engine Light and make the necessary 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!

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: Truck is back-firing.

There are a few possible causes for an engine to backfire. Some of the more common causes are a vacuum leak, lean condition caused by a weak fuel pump, an exhaust manifold leak, or a faulty ignition system. With the...

Q: The wires coming off engine near alternator and belt assembly are burnt

Without a complete inspection of the vehicle to find out why the wires shorted it would be hard to know the exact part to buy. The harness may be just the alternator harness or the engine harness that goes to...

Q: P0442

As you may already know, this may be related to a faulty or leaking gas cap, however this can also be related to several other factors such as the following: A non-conforming gas cap (i.e. not factory/original brand) A...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.