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when vehicle is idling, blows cool heat. when driving, blows warm air.

My 4WD light is on but I'm pretty sure it's not actually in 4WD. A mechanic friend says "the motor" is fine, not sure what motor he's talking about. I think he said he thought the problem was the transfer case module. At any rate, I was wondering if there's anything else it could be before I go buying the part because even online they're expensive. Also, where on this particular car would it be located? I believe he said it was just a deal where the old one sort of unplugs and the new one plugs in, didn't sound like a big deal to change...do you know?

I can drive about a half mile, then the oil light comes on. I wait five minutes and start to drive, then it happens again? What could cause this?

I can't turn on the air conditioning it has the compressor power killed at the pressure switch

While driving the drive control system just pops on. I took the car to the BMW dealer and they want to charge me 1400.00 dollars to fix it. They say I need a steering angle sensor. I just want to know if any other owners have experienced this problem.

wont stay idling

when im barley moving either forward or reverse, car is very hard to steer

my check engine light is flashing when i am driving and stays on all the time when its in park and it is idling rough

not enough power when ecelarating

I had to have the timing belt and water pump replaced after my Nissan broke down, but now the engine idles very rough. I took it for diagnostics and the guy said it was multi cylinder misfire, I believe it was code 0303. I'm worried that I bent a valve when the timing belt broke. The timing belt/water pump repair cost $700. I know nothing about cars. Could it just need to have the timing adjusted?

when i am driving it it has hesitation in it while driving down the road.Have had tune-up on it and it still does it carried to advance auto parts cause the engine light came on and they check it and the code was 1404 but they could not find 1404 in their book

What intake manifold gaskets require replacement when replacing the rear bank of spark plugs - is plenum removal required only or does the entire manifold require removal and gasket replacement upon reassembly?

What intake manifold gaskets require replacement when replacing the rear bank of spark plugs - is plenum removal required only or does the entire manifold require removal and gasket replacement upon reassembly?

Not having any performance problems other than gas mileage seems to be a little poorer. Spark plugs are supposed to be good for 100K.

Just replaced the throttle body and the new one is idling too slow only 250-500 rpm