Skip the auto shop - Our mechanics make house calls

Q: start and go

asked by on

During the winter, we lost the key to our truck. Brought it to the dealer and had a key made. Ever since then, it has a start and go problem. Brought it back to the dealer snd they put in a new starter. Worked ok for a few days, but went right back to the problem. Took it backseveral times, they couldn't find anything. Still doing it. Perplexed!! Whatdo think is going on?

My car has 81729 miles.
My car has an automatic transmission.

Your truck is equipped with an immobilizer that may be having a problem intermittently reading the key. The immobilizer is a security feature that has to recognize the chip built into you key in order for the vehicle to start. It’s a great anti theft feature, but unfortunately adds a whole new element into problems with cars not starting. If the problem started only once the new key was used, then it’s likely a problem with the new key, though the entire system should be checked for proper operation. Unfortunately immobilizer part replacements usually can only be done at the dealership, but for a second opinion, you can have the system diagnosed by an independent technician, such as one form YourMechanic.

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. start and go

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: Power steering

Hi there: In most cases, as the power steering pump goes - so does the entire system. If you're power steering is making squealing noises as you turn, that's typically an indication that the power steering belt (drive belt or...

Q: Car has sat for a month and won't start

It's not uncommon for your battery to be drained down if your car sits for a month without starting. Modern vehicles have a lot of technology which requires a lot of computers. Those computers have what is called keep alive...

Q: My car won't unlock

When this situation occurs, it's commonly due to a failure within the power lock module, which is what receives the signal from your FOB key and sends a signal to each door to unlock. However, it could be a simple...

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...
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...
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...