Nissan Altima 2.5, service engine light on car is hard to start

2004 NISSAN ALTIMA CAR SERVICE MANUAL


for the easy solution download the pdf file

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

1: Service the car :)
2: When I change the oil on my Toyota, I clear this light by holding the mileage button while I am starting the car.

Have the vehicle scanned again to see what codes you get. Its possibly either mismatch firing order with the coil boots or hairline cracks in one or more of the spark plugs. I'd remove them and closely inspect the ceramic for damage, even the most minute crack can cause an arc. Then there is always the possibility of faulty sensors.

There is a known issue with the crank/cam sensors. They are on there third update from Nissan. The normal symptom is an extended crank and occasional rough running. Knowing what code is turning on the check engine light will seal the deal on whether or not its the cam/crank sensors.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If you get ck engine light on , you have a cyl. number
that misfires , ck vacuum leaks on intake manifold around that area aspecially intake manifold gasket.

is there any engine warning lights coming on if not when was the last full tune-up, plugs wires all filter's , if not or don't know ty that.

tell your mechanic to look up Service Bulletin #96-032 this could fix your problems

try a tune up first and maby have a look see and clean the parts and ck for any loose or broken parts air cleaner clogged ?

Plug out all the sensors at the bottom where you sprayed it down and blow out all the plugs on the inside