Skip the auto shop - Our mechanics make house calls

Q: Automatic transmission warning light.

asked by on

The auto transmission warning light comes on occasionally (the tranny stuck in 4th gear) after I start the car. Turn the engine off, re-start the light stays off. Never comes on during driving. Hope you able to give me some advise what could be cause of this bug.

Thanks

My car has 80000 miles.
My car has an automatic transmission.

A: Hi there. Since the warning light is coming...

Hi there. Since the warning light is coming on, I would usually scan the computer for codes to see what is going on. Most of the time this is caused by a failure in one of the transmission sensors or the valve body. It can also be caused by low fluid, so I always check that at the beginning. If the fluid is fine, then the codes may indicate where the diagnosis should begin. Monitoring the sensors is the only other way to see which one is failing. If you are planning on having this transmission shifting issue inspected, consider YourMechanic, as a certified mechanic can come to your home or office to pinpoint the problem and advise on 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・Save up to 30%

Get a quote

What others are asking

Q: car won't start

Hello. If the battery is testing good and has the correct CCA and voltage, I would look towards a faulty starter or wiring fault such as insufficient ground. I recommend that a technician check the starting system . If the...

Q: What can cause the car stopped stay in a low gear and not really shift

This may be a sign of a faulty transmission control solenoid. Modern automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission fluid into...

Q: Blow out and leak under car.

The first thing I would recommend you do is check all your fluid levels to narrow down to the system that these parts came from. Take a sample of the fluid that leaked and note the location of the leak...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...