Skip the auto shop - Our mechanics make house calls

Q: Downshifts suddenly automatic locks

asked by on

I recently had my automatic transmission repaired. It will drive fine for a while and then all of a sudden will downshift and stay like that until my car is turned off and started again. My automatic door locking has stopped working too. Do you know what’s wrong, and how I can fix these problems?

When you encounter the problem try and see if your cruise control works. If the brakes lights stay on, it will cause the cruise to be inoperative and affect the overdrive of the transmission and door locks autolock function. Come to a stop and put the vehicle in park. Check to see if the brake lights are on. If they are, then you may have a bad hydraulic brake assembly causing the problem. It may need overhauled or replaced. If you need help having any of these repairs done, a certified expert from YourMechanic can come to your car’s location to inspect the shifting problem and guide you with the correct 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: Bad battery, compression clutch, and loose bearing. 2000 Saturn LS

Hey there, thanks for writing in about your 2000 Saturn LS. This sounds like you have a short somewhere in the electrical system. I would start by testing the power supply to each of the various components or first try...

Q: 1992 Ford F-350 won't start or when it does only drives 20 ft then dies

Hey there, thanks for writing in about your 1992 Ford F-350. There are a few angles to cover when checking for problems on a stalling vehicle. The fuel pressure must be correct and a clogged fuel filter can lead to...

Q: Metallic noise while disengaging clutch in first gear on a car with manual transmission

If you do not hear that noise in any other gear, then it can't be that clutch, because the cutch would make the noise in every gear. It would be the problem inside the transmission. In your case, it's probably...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.