Q: Engine and radiator dash lights

asked by on

I have a 2003 Cadillac DeVille North star v8 4.6l and the service engine soon light won't go off. My engine start and runs fine but smoke was coming from the middle of the engine for about 20 seconds. What could be wrong? The check coolant level comes up on my dash but my resvouir is full. Idk what could be wrong, also there sometimes a rough start in the morning.

Hello. With the check engine and cooling system light both being illuminated, the first step you need to take is to have the vehicle scanned for diagnostic troubleshooting codes. This can be done by most technicians, and can also be done at most local automotive parts stores. The light continuing to stay on is because the issue has not been fixed yet. But the good thing is whatever is wrong is very likely related to the code, which will make diagnostics that much easier. If the coolant is full but not flowing through the system due to a clog, bad water pump, or bad thermostat, then the light will also illuminate. The light is generic telling you the vehicle is experiencing and issue. If the vehicle is running well, the issue may be electrical. Have the vehicle scanned, and continue diagnosis from there.

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. Engine and radiator dash lights

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: Car battery light came on and while driving my car suddenly stalled and my steering wheel got really stiff

Your problem could be as simple as a broken accessory drive belt - sometimes called a serpentine belt. This belt drives both the alternator and power steering pump. It is also possible the engine stalled for some reason, with the...

Q: Opinion on GM Northstar V8 engines

I don't think much of them. Those things blew head gaskets and it sometimes costs 5-8,000 dollars to repair them. It's a racing engine. It's fine for race cars but for cars that people drive every day, it's overkill and...

Q: AC fuse keeps blowing

I would try and disconnect the A/C compressor to see if the fuse still blows. The compressor is the only thing that gets energized in all settings except economy. If this works and the fuse does not blow, then the...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...