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・Fair and transparent pricing

Get a quote

What others are asking

Q: The engine misfires at 2000 RPM if I accelerate too fast

Seems like the camshaft is making the ignition retard too much. Your system should read at -11 to -12 for retard timing. It is possible that your vehicle is probably reading around -13 to -14, which will cause the engine...

Q: Heater blowing cool air 2014 Jeep Wrangler

Hi there - this sounds like a heater blend door problem - only routing warm air to the passenger side of the cabin. I would recommend a heating system inspection by a mobile, professional mechanic, such as one from YourMechanic,...

Q: Hi I recently replaced my transmission on my 2011 GMC Terrain and now it says reduced engine power any clue to why ?

The reduced power is due to a major sensor or actuator failure in the engine, transmission or other vehicle systems that the on board computer system sees as a major failure and limits the throttle and speed of the vehicle....

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...