Skip the auto shop - Our mechanics make house calls

Q: collision sensor goes off

asked by on

My truck started having issues when the Collision Sensor went off. It happened when I was driving down the road doing 25 to 50 mph. When the sensor would go off I could feel the break at the same time. I was only driving, not breaking, not turning only driving. The GMC dealer cannot find anything wrong. So I brought it back home. Then 3 days later it happened again. Can you please help me figure out what the problem is? Thanks.

A: Hello. It sounds like there may be an inter...

Hello. It sounds like there may be an intermittent problem with the collision sensor. Keep in mind that intermittent problems are some of the most difficult to diagnose. When the sensor has an intermittent problem, it may cause the truck to slow down on its own when it shouldn’t. If your truck is still under warranty, it is best to take it back as soon as possible every time this happens so that they can see what is wrong with the car at the time it happens. It will be easier for them to make a determination because it is an intermittent problem.

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: Overheat

Since the radiator fans do come on, the fan relay is most likely ok. You mention that you replaced the cylinder head temperature sensor located on the back of the engine/cylinder head, behind the alternator. If you did not replace...

Q: I lost my engagement ring in the defrost vent, please help!

The good new is, your ring is still there, but unfortunately it is not easy to get to. Dash work can be some of the most challenging jobs to perform. If your ring fell into the vents on the driver...

Q: Burning through a lot of oil between changes

Your attention to the engine’s oil level should be commended, not every driver is as diligent. To answer the question, yes, concern is in order here. GMC has had an issue with the 2.4 liter four cylinder engine, and has...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.