Skip the auto shop - Our mechanics make house calls

Q: Re- set computer on vehicle

asked by on

Recently replaced the alternator by a local mechanic. After it was replaced the engine idles rough, key remote doesn't work and the radio doesn't work. The mechanic told me to take it to a ford dealer and have the computer reset. Is this a true statement?

My car has 128000 miles.
My car has an automatic transmission.

A: This is true. After the battery is disconne...

This is true. After the battery is disconnected, the body computer will sometimes not recognize items that were not with the vehicle originally. The cost to get the computer reset may exceed the cost of getting the alternator replaced. The reason why you would have to go to the dealer is because they have the WDS scanner needed to reprogram the system. If you want a second opinion on this, consider having a certified technician diagnose the rough idle and electrical issues you’re experiencing.

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: F-150 will not run when it is over 70 degrees

I see stuff like that all the time. A lot of times it's the temperature sensor for the computer that has gone bad. It tells when the engine is hot and when it's cold. If it gets too hot outside,...

Q: How do you turn on the map lights?

Your car is equipped with two map lights located in the front of the vehicle, ahead of the rearview mirror. They provide limited illumination for specific tasks. Here’s how to work them: Locate the map lights. If your car...

Q: Will a map sinser affect the transmission?

Hey there. You have vehicle speed sensors at the wheels and the engine and transmission also have speed sensors. You did not specify the actual code that you received. This code will help in the diagnosis of the Check Engine...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...