Nissan Repair: error code P1273, vacuum pipes, nissan sentra

Question
Hi
i have a Nissan Sentra 2004 Se. It is about 130000km and I bought it on Dec 08 (it was 86000km).
Since I bought it I had so much problems with my car which I am getting frustrated.

Lately I had  a check engine light and i had a sensor (he said the sensor that mixes the amount of gas and air) is gone. before that I was starting to think I have to check the car as it is burning a lot of gas.

So anyway I had it changed and the saving of gas difference is huge before I would do 350-400km with 1 tank now it is doing around 500km.

The problem started about 8 days after it was changed. I had a check engine light it said code P1273. they said it is contaminated gas, they put injector cleaner and I started to use a better gas.
about 400km after again the light is on. I go again they say the one of the vacuum pipes or whatever was loose , there was too much air in the system and it can be that. anyway i leave the palace 5 km after the light is on again 3 days after i go again they said they may have forgot to reset the code not to worry....

they reset I leave . yesterday about 150km after the light is on again. I am getting frustrated. I do not have money anymore to fix this car and it is really driving me nuts.
I didn't check the code yet but i pretty sure I know what it is...

Can you help me  with that. I read in one forum that the whole computer needs a reset... Like total unplugging and reset. i am scared about it, (i don't know how to do it anyway#

Can you help me....

My previous problems in my car
1- gas cap malfunctioning #another  but resolved check engine light issue#

2- head gasket #yes head gasket, it was resolved under warranty by Nissan-it was about 95000km#

3- Clutch #it is manual# gone and after market clutch installed still have problems

4. maintenance: Belts

5. Lower control arms #still paying for it#

6. Maintenance ; Brakes #rotors were extremely rusty/flaking#

7. Check engine Light- the sensor that mixes air an fuel. changed

8. check engine light  -8 days after #p1273#

9. check engine light  -400km after #p1273#

10. check engine light  -3 days after #p1273#

11. check engine light  -5km after i left. #p1273#

12. check engine light  -150km later #p1273)

Answer
Dafna,

The P1273 is usually associated with an exhaust leak or a defective oxygen sensor.

The clutch should be looked at for a leak at the clutch release fork.

Other issues you describe are just part of a car getting miles on it.

Sounds like, once you get the P1273 done you will have a nice car.