Skip the auto shop - Our mechanics make house calls

Q: Speed control broken. 2005 Buick Terraza

asked by on

My speed control doesn’t work. So I had a certified General Motors dealer look at it. The steering switch was OK. The Engine Control Module was OK. And I even tried a new Engine Control Module, but it didn’t do any good. Do you have any suggestions or ideas as to how to fix this?

A: You may be having a problem with the thrott...

You may be having a problem with the throttle control actuator assembly not getting a signal from the ECM, or the actuator module is defective. The cruise control test with the dealer scanner can monitor all the inputs and outputs of the cruise control and should have been diagnosed by the dealer when you had them test it. If the ECM did not fix it, then the throttle control assembly may be the problem. Have the dealer test it again since you paid for the diagnosis. If you’d rather have it checked elsewhere, a certified professional from YourMechanic can come to your car’s location to inspect the speed control.

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: Carburetor is getting gas but will not fire. New fuel pump and cleaned the carburetor twice. It will start on starter fluid but dies.

Engines that won't run are frustrating. Lets start by assuming you are getting fuel to pass through the carburetor. Next you will want to look into spark and compression. The spark may be the easiest to look into. You need...

Q: Accidentally brushed start/stop button and car shut down

Hey there, thanks for writing in about your 2014 Buick Verano. There is not an immediately available safety switch like this. However, anything is possible to make for a certain price. You may want to take the car to the...

Q: Headlamp control indicator on. Exterior bulbs out. Estimated cost?

Hi there. It's quite possible that you have an electrical relay issue that is causing power to remain open to the damaged headlight lamps. This should be repaired at the same time you complete the bulb replacement. However, there are...

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...
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...
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.