Q: Transmission problem - 2010 Buick Lacrosse CXL

asked by on

Hello

i have a question i have a 2010 buick lacrosse cxl

and i have a problem with the transmission

when i start the car in the morning when the car is cold

when start running the car ..the car will goes from third speed to second speed

and it will not shift

i need to turn the car off and turn it on back two times and it start working properly after that

i have scan it and it show p0989 transmission fluid pressure sensor

what will be the problem how can i fix it

The Diagnostic Trouble Code P0989 can set due to the following causes: Defective transmission fluid pressure sensor; Malfunctioning electronic pressure control solenoid; Defective electrical components, such as wires, connectors, and fuses; Insufficient transmission fluid levels; Dirty transmission fluid; Blockages within the hydraulic pressure system; Problems within the internal transmission; and in rare (very exceptional) cases, a faulty PCM, or transmission control module.

You should check the transmission fluid level first. If it is below the minimum level, that could account for your issue although, even if the fluid level is OK but it is contaminated, that could account for the problem.

If there is no issue with the fluid level or quality, a mechanic, like one from YourMechanic, will have to methodically go through each of the other listed possible causes during a Pressure Switch diagnostic. Best of luck.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Transmission problem - 2010 Buick Lacrosse CXL

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: Q: About my car?

Hi there: When a car starts and then stalls, it's possible that the mass air flow sensor, fuel pump or fuel filter is faulty, dirty or broken. It's also common for the throttle body to become clogged with carbon build-up;...

Q: Q: Transmission not shifting into gear.

From the sound of your description, I would say your assumption of the problem with your Chevrolet Cavalier is correct! This sounds like you are indeed experiencing a broken shifter cable. Broken shifter cables fail due to years of use....

Q: whooshing sound after hitting curb driver side front

Hello, thank you for writing in. The vehicle may be having issues with the tires, suspension, wheel hub, or the brakes. The noise is likely coming from something that has been damaged, and is now making contact with other components...

Related articles

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...
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...
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...