Skip the auto shop - Our mechanics make house calls

Q: The car shakes and randomly cuts off while driving. The car has steam/smoke coming from under hood.

asked by on

I have a Cadillac dts, year 2006. the car drives smooth when it Is driving, however it randomly cuts off if im sitting at a stop light and sometimes while driving. the car has also recently started having steam coming from under the hood and gives off a smell of burning fluid when the air is on. The check engine light code says that the secondary air pump sensor has failed. Please help!

My car has 112000 miles.
My car has an automatic transmission.

Hi and thanks for contacting Your Mechanic. If your engine light came on for the secondary air pump sensor, then it is possible that the secondary air pump (smog pump) has failed. The pump has oil in it and if the pump seized up, the case may have broke and leaked out the oil or burned the oil causing the smoke. Also, there could be a coolant leak causing the smoke under the hood. If the pump is not working, then I suggest replacing the air pump. If you need further assistance with the engine having a lack of power, shaking, and crating smoke under the hood, then seek out a professional, such as one from Your Mechanic, to help you solve this issue.

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!
  • Home
  • Questions
  • The car shakes and randomly cuts off while driving. The car has steam/smoke coming from under hood.

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: Vehicle intermittently dies when coming to a stop

This may be related to a dirty or faulty idle air control valve. This is a unit that reads the air intake into the fuel injection system as it is mixed with fuel prior to being supplied to the motor....

Q: Engine runs fine but no power to the wheels when the car is in drive or reverse.

The first thing to do is to have the computer and transmission scanned to get the codes stored. Depending on the codes stored the transmission may have a bad pressure control valve that is not letting it move. A full...

Q: My oxy pst fuse keeps blowing out

Usually when a fuse blows, it is due to some kind of short in the electrical circuit that is related to the blown fuse. I would recommend having the wiring to the cooling fan inspected for damages. I would also...

Related articles

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 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...
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.