I just replaced the sensor and the heat started working just fine now I have no heat again but it blows out cool/warm air

level oil transmation is ok

I've replaced recently the catalytic converter, spark plugs, coil #2, and did a fuel injection. No one can seem to find the problems. Any help would be great.

Check engine soon light is on. I just had oil change and in 3 days, it needed 1/2 quart of oil. Never had this problem before.

Car will not start. Got P1128 code. ??? Please help! Thanks!

I had my car in for a routine oil change today and just after I drove away my check engine light started flashing at me and then as I began to break it started to chug/shake. It stopped when I was fully stopped but did it again as I started to accelerate again and it smelled like burning. I pulled over and the dealership came to tow it back. I am wondering what it could be because I don't want to get hosed!

just wanted to know what this is and can you drive the car before replacing the part?

I have a 2002 Nissan Altima SE 3.5L and while leaving the house one day as I began to accelerate the motor lost power then wouldn't rev over 2500rpm, even in park. I replaced the throttle body but the problem is still there. It's now throwing multiple other codes; P1564, P0102, P1102, P0506, P0507, and P0113. Any ideas? Thank you

My heater only get hot if I'm driving over 40mph,,took it to dealer,,they said the hose needed bleeding or bubble in the hose something lik that,,,got it fixed heater worked maybe 2 months,,,took it back now they say its the water pump making the heater not work, how do you check water level for the pump? Cos I never see water leaking from my car,,I think they are taking advantage of me,,,,thanks for your help

My daughters Altima began shaking at times when first started and sometimes continues to shake when put into drive. It almost feels like something is plugged. Could this be the catalytic converter beginning to plug? It usually takes care of itself if you turn the car off and re-start it most times.

Recently due to the economy a lost of job,unable to pay my car payment,so the finace people used the kill switch and after I paid them my car would not crank after that unless I turn it on and off several times before it cranks,it does'nt drag or anything it seems it does'nt want to catch. What could be wrong? can anyone out there have a answer?.

recent purchase from Nissan who said the timing "chain" just needed to be tightened. Timing chain v. belt?

Rpm's are good they stay within (2) goin' 60 to 70 on the FreeWay, but Once I hit 75 or 80 the Rpm's go up to (3) and the Rpm's never come back down to (2) or 2 1/2..

While driving my Nissan would start to sputter and the rpm would flex and the engine would cut off. This happened several times and when I would rev the engine during this time it would delay the stoppage. Now it would not start, I let the fuel level get low but it should start and now it will not.

I had a question if the check engine lights come on due to the catalyic converter and then both the brake and battery lights come on. What does that mean? Would it be an alternator problem? Because I have no power in my vehicle at all.