Question about 2005 Nissan Altima

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Weak vent air

Whenever i start the a/c of my 05 nissan altima, it only took a few minutes of good air flow. then air flow weakens even at high speed. i noticed one pipe going to compressor is freezing too much. what could this be? please help?

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Your thermostat is not working properly it should trip off the A.C bt not doing so

Posted on Aug 01, 2010

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Posted on Jan 02, 2017

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I have a 2007 Nissan Altima 2.5 with a "Check Engine" light - a Code of 0171, "System Too Lean". Car engine is revving high, up and down constantly.


code p 0171 refers to system too lean===causes --intake / exhaust leak---AIR system---MAF/VAF sensor fuel pressure ---pump---injectors/s --HO2S sensor
two things stand out
air leak inlet manifold --check for vacuum leaks in vent controls , transmission actuator , brake master cylinder and vacuum hoses
heated oxygen sensor (HO2S) faulty
basically the ECM gets a report from the HO2S and adjusts the air /fuel mixture accordingly so if that unit is faulty or the wiring is faulty then the ECM cannot maintain correct mixture
also the ECM gets reports from the mas air flow ( MAF) or volume air flow) and accordingly also along with the HO2S report adjust the throttle position as well
I would be taking it to an accredited service shop that works on your make of vehicle and discuss the code and the causes with them so that it can be fixed

Jul 26, 2016 | Nissan Cars & Trucks

3 Answers

2003 Nissan Altima 2.5L Service Engine Soon Light is on, Auto Zone says codes are for MAF and O2 Sensors. Car hard to start after driving a while but when starts appears to run smooth. Auto Zone thi


ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........
  • P0103
    Mass Air Flow Sensor Circuit High Input
  • Possible causes
  • Faulty mass air flow sensor
    - Intake air leaks
    - Dirty mass air flow sensor
    - Dirty mass air filter
    - Mass air flow sensor harness is open or shorted
    - Mass air flow sensor circuit poor electrical connection
  • Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
  • possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
    - Engine stall
    - Engine running rough
    - Excessive fuel consumption
    - Excessive smoke
  • the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
2003 NISSAN Altima Sedan OBDII Codes List

Oct 22, 2014 | 2003 Nissan Altima

2 Answers

Low airflow out of vents


Posted by Gary Brizendine on Jan 11, 2014

me thinks he fixed it by now.
and is not even a question.,
why?
what can i do
who can fix it.
what parts are bad.
what tests can I do.
it lacks even a question.
does it fail on high does blower work on high well?
are fuses good
did you scan it first?
oops.

Jan 11, 2014 | 2004 Jeep Grand Cherokee

1 Answer

94 nissan altima won't start and iddle after cleaning IACV valve


An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The cars computer or PCM (powertrain control module) receives information from various sensors and will output signals to adjust the idle air control motor in or out to adjust engine idle speed by controlling engine idle air. An idle air control motor can fail one of two ways, either the motor short circuits and stops working or the motor will develop high resistance and cause the idle air control motor to react slowly, either failure can cause the engine to stall at idle. When a trouble code scan is performed it sometimes won't always detect a failed or weak idle air control motor.

Oct 08, 2012 | Nissan Altima Cars & Trucks

1 Answer

2003 Altima: my 2003 nissan altima is shaking everytime i pull ...


need to pass a scanner to see other problems that you have
a system works perfect when everything is working properly, you definitly have some other problem that is not letting the engine work
idl speed
air leek in vacum hose
clogged air filter
fuel filter

Nov 06, 2017 | 2003 Nissan Altima

1 Answer

1995 Altima blows hot air when AC is completelly off.


actuator door stuck or motor burnt not closing off heat ,if not confident to fix take to specialists!!!! :)

Jul 06, 2009 | 1995 Nissan Altima

1 Answer

Failed exhaust emission tests on Nissan Sunny N14 eng 1600


Clean the MAF (mass air flow sensor.)Follow the hose from the air filter to the air flow sensor.Use a proper cleaner rated safe for this purpose.

Jun 25, 2017 | 1995 Nissan Altima

1 Answer

A/c vent issue


heater blowing cold when engine idleing,works good when rpm are up. what is problem? pete

Jun 06, 2008 | 1997 Nissan.5 Altima

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