Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light and air conditioning problems

asked by on

My Check Engine Light is on. I was told that the code reader says I need to replace the spark plugs, and the camshaft position sensor. I am also having issues with my air conditioner. Sometimes the unit stops blowing cold air out of the vents. Instead, a mist comes out, in which case, the air from the vents seems to stops blowing completely out of the front vents, while blowing hot air out the rear vents.

The Check Engine Light illumination is most likely due to your engine having a misfire, and also getting a code to the cam sensor. If the misfire code is pointing to a particular cylinder misfiring, there could be another problem with the ignition system. The cam sensor should also be checked for failure.

The AC can then be checked for the system freezing up from possible temperature sensor failure, or a problem with the expansion valve. Only an in-person check can diagnose all three problems.

I would recommend that you start by having the Check Engine Light illumination diagnosed by a certified mechanic, such as one from YourMechanic.

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

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: Reduced power twice

Hi There, Unfortunately, there are numerous reasons that may cause your car to go into a reduced power mode. This may be a result of engine control problems or potentially a transmission control problem. Things that may cause this might...

Q: Car turns off after driving 20 miles

Hello there, a few different parts can cause the vehicle to stall out and die like you have described. The most likely are the fuel pumps, an intermittent wiring issue, a bad battery cable, a faulty EGR, vacuum leak or...

Q: Hello I have a 2001 Montero sport 3.0 that died and tries to start but won't acts like it's way out of time. Would a bad CPS cause this problem?

Hi there. A crankshaft position sensor will cause the engine to not start if the sensor has failed. The crankshaft position sensor is designed to tell the ECM (computer) when the cylinder number one is at top dead center and...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.