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2001 Pontiac Grand Prix Questions

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I just wanted to know if i buy this car with 101,600 how soon will it be before i have to buy another vehicle?
I did a diagnostics on my car, I don't know how to read it just see the code it puts out, I went ahead and wrote the numbers down that were the readings from the test like the fuel sys 1 cl, catt % 3.9, veh speed 5, map (hnhg) 11.5 are some of them, changed the crankshaft Position sensor A circuit range/performance, took readings again got 1 cl, 2.7 for the catt, 0 on veh speed, 13.00 on the map, are these normal? But I got another reading of 0420 and 0463, are these related to the first code? Why wouldn't these come up on diagnosic test when it gave the P0366 code. I thought when you did a diagnostic test on your car it reads all things wrong at the same time. Thank you
my cars fuel gauge stays fuel until it starts running low on gas then the gauge goes down slowly to the empty level It has done this since I bought it 3 years ago. I haven't ever had a readiing code like this. I did have to change my gas cap would that have anything to do with the code 0463?
I'm trying to smog my car and got the code P0336, I fixed that then got a code 0420 and 0463 which I need help figuring out what I need to do to get it to pass. the catalyst system code I checked hoses, vacuum leaks, bare wires, I looked at everything and can't see anything out of place or broke. Seems like I had this problem before when it needed smogged but I didn't have replace the catalatic converter. I can't remember what was done but it wasn't much. The code 0463 didn't come up until I was told I needed a new gas cap. Would the gas cap give the reading 0463 if it was new? Help I'm running out of time
I have replaced the water pump but cannot find the location of the thermostat to replace it too.
WAS TOLD NOT GETTING ENOUGH FUEL TO OPEN INJECTORS
Switched out some of the fuses,they were still good though.Please help.
I have a 2001 Pontiac grand Prix. The key was getting old and started falling apart. One day the whole rubber insert fell out and I can't find it. My car won't start without that insert which has a computer chip in it.
I'm trying to get a key fob and idk if it already has the internals or not.
I lost my keys in my front yard and is there any way to locate them by the chip that's in the engine key at all please help I hae no ride till I find them.thanks
I'm a mother of three and this is my only vehicle how much will it cost to fix and where do you think it's coming from
Help me fix my car..
How to determine what hose is leaking
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