Skip the auto shop - Our mechanics make house calls

Q: Hi Jerel, I have a 2006 Cadillac STS that has been parked since July. It was working fine when we parked it, now it will not shift

asked by on

Hi Jerel, I have a 2006 Cadillac STS that has been parked since July. It was working fine when we parked it, now it will shift out of park into reverse but will not shift to any other gears. What could be causing this problem?

A: Hello. A transmission that will not shift ...

Hello. A transmission that will not shift into gear can be caused by a few different things. A few common causes are a locked shifter, low or contaminated transmission fluid, or a failed transmission component. A locked shifter can occur for a variety of reasons, and will prevent the transmission from shifting. The mechanism can be released by inserting the key into the shift lock slot, usually located near the shifter. Another thing to look at would be the transmission fluid. If it runs low or becomes excessively dirty it may cause the transmission to experience all sorts of issues, including shifting problems. The same with a failed transmission component. If one of the components, such as a shift solenoid or transmission sensor, fails, they can prevent the transmission from shifting properly. In some cases they may even prevent the transmission from shifting at all. It may also be possible that there is some sort of internal transmission issue causing the problems. As these sorts of transmission related issues can sometimes be difficult to diagnose, I would recommend having a professional technician, such as one from YourMechanic, come to your location to diagnose the cause of the shifting problems.

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: Interior lights are on, but car won't start

It sounds like you may have a bad starter. Some times starters will go bad intermittently. This is often due to a loose connection of some sort that causes the voltage to be lost in the path from the battery...

Q: ABS light and traction control come on while driving, go away after restart.

I would have the car scanned with an ABS scan tool to have the problem diagnosed.

Q: No gears in the transmission. I have a 545RFE transmission.

Hi there. First check the transmission fluid and make sure that it's full and red in color. Then check the harness to the transmission shifter position sensor and see if it's connected. There is a pressure relief valve in the...

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...
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...