I own a 2002 Nissan altima 2.5S which I bought from someone at 129000 KM & now it is at 213000 KM. I get done regular oil change every 3 Months or 5000 KM. Got sensor changed from dealer on past 2 years. Now the Engine line is ON and the last time when I get it checked at dealership, he said machine figure out Small Leak & I should not have any problem with it & keep on driving. I showed it to some other mechanic yesterday & he said "Misfiring # 3". He need to analyse more to detect problem as per him. I am not sure what to do? Light goes ON and Off by itself. When it start flashing, Car starts shakin & if I keep driving, light just stay on and shacking stop? If anyone can help me, I will appreciate.

Question edited for clarity and maker.
Question moved to Nissan Altima.

Clean Throttle Body and Mass Air flow Sensor (MAF). Check oil level and top up to the upper line.

https://www.google.com/search?q=2002+nissan+altima+clean+throttle+body

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Here is recommended maintenance up to 10 1/2 yrs. If you follow through list, you should be able to tell by elimination what you may need. Here is the link - also list pasted below, here:

http://www.kia-forums.com/2g-2006-2010-rio-rio5/35574-maintenance-schedule.html

SUGGESTED Maintenance Schedule:

Months Kilometres Maintenance Type

4 months 6 000 km Maintenance #1
8 months 16 000 km Maintenance #2
12 months 24 000 km Maintenance #1
16 months 32 000 km Maintenance #3
20 months 40 000 km Maintenance #1
24 months 48 000 km Maintenance #2
28 months 56 000 km Maintenance #1
32 months 64 000 km Maintenance #3
36 months 72 000 km Maintenance #1
40 months 80 000 km Maintenance #2
44 months 88 000 km Maintenance #1
48 months 96 000 km Maintenance #3
52 months 104 000 km Maintenance #1
56 months 112 000 km Maintenance #2
60 months 120 000 km Maintenance #1
64 months 128 000 km Maintenance #3
68 months 136 000 km Maintenance #1
72 months 144 000 km Maintenance #2
76 months 152 000 km Maintenance #1
80 months 160 000 km Maintenance #3
84 months 168 000 km Maintenance #1
88 months 176 000 km Maintenance #2
92 months 184 000 km Maintenance #1
96 months 192 000 km Maintenance #3
100 months 200 000 km Maintenance #1
104 months 208 000 km Maintenance #2
108 months 216 000 km Maintenance #1
112 months 224 000 km Maintenance #3
116 months 232 000 km Maintenance #1
120 months 240 000 km Maintenance #2
124 months 248 000 km Maintenance #1
128 months 256 000 km Maintenance #3


MAINTENANCE #1

MAINTENANCE #1 INCLUDES:

Replace engine oil and filter
Check fluid levels (pwr. strg., brake/clutch, coolant, washer)
Check tire condition and pressure (including spare)
Check exterior & interior lights for proper operation
Check windshield washer/wiper function
Check horn function
Check handbrake function/freeplay
Lubricate all latches, hinges and locks

* = if equipped
See "Model-Specific Maintenance"


MAINTENANCE #2

MAINTENANCE #2 INCLUDES:

Replace engine oil and filter
Check fluid levels (pwr. strg., brake/clutch, coolant, washer)
Check tire condition and pressure (including spare)
Check exterior & interior lights for proper operation
Check windshield washer/wiper function
Check horn function
Check handbrake function/freeplay
Lubricate all latches, hinges and locks
Check engine coolant specific gravity
Check engine air filter; knock out dirt/bugs, replace as req'd
Remove wheels and brake drums, check pad/shoe thickness; inspect calipers, cylinders and shoes for proper function, leaks or damage; adjust rear brakes as required.
Rotate tires
Visually check underbody fasteners for condition & integrity
Check brake/clutch pedal freeplay
Check steering wheel components for proper operation
Check CV boots/tie rods/ball joint boots (visual inspection)
Check all seat belts and anchor integrity
Check exhaust sys. for leaks, mountings, brackets; heat shield
Check transfer case oil level & condition, fill as required
Check front & rear differential fluid, fill as required*
Check man. transaxle oil level & condition, fill as required*
Check auto transaxle fluid level & condition, fill as required*
Lubricate driveshaft u-joints (early Sportage only)
Road test vehicle

* = if equipped
See "Model-Specific Maintenance"


MAINTENANCE #3

MAINTENANCE #3 INCLUDES:

Replace engine oil and filter
Check fluid levels (pwr. strg., brake/clutch, coolant, washer)
Check tire condition and pressure (including spare)
Check exterior & interior lights for proper operation
Check windshield washer/wiper function
Check horn function
Check handbrake function/freeplay
Lubricate all latches, hinges and locks
Check coolant specific gravity
Check engine air filter; knock out dirt/bugs, replace as req'd
Inspect, deglaze, clean, adjust & lubricate brake components
Rotate tires
Visually check underbody fasteners for condition & integrity
Check brake/clutch pedal freeplay
Check steering wheel components for proper operation
Check CV boots/tie rods/ball joint boots (visual inspection)
Check all seat belts and anchor integrity
Check exhaust sys. for leaks, mountings, brackets; heat shield
Check transfer case oil level & condition, fill as required*
Check front & rear differential fluid, fill as required*
Check man. transaxle oil level & condition, fill as required*
Check auto transaxle fluid level & condition, fill as required*
Check idle speed
Inspect power steering lines & hoses (visual)
Check A/C compressor operation and performance*
Check brake line fittings, bleeder screws, booster for damage, looseness, leaks
Road test vehicle

* = if equipped
See "Model-Specific Maintenance"


KIA MODEL-SPECIFIC MAINTENANCE

In addition to the KIA Basic Scheduled Maintenance, certain KIA Models will require the following maintenance services:

ALL MODELS

(Every 36,000 km or 18 months)

Manual transaxle service (except Sportage)
Automatic transaxle service (except Magentis)
Check drive belt condition & tension
Inspect front ball joints

ALL MODELS
(Every 48,000 km or 24 months)
Replace engine coolant
Replace engine air filter
Inspect fuel lines & connections
Inspect ignition wires
Replace spark plugs (except Platinum)

ALL MODELS
(Every 60,000 km or 30 months)
Replace brake/clutch fluid
Inspect EVAP canister & vapour lines

ALL MODELS
(Every 72,000 km or 36 months)
Replace fuel filter
Inspect PVC system/hoses for integrity

ALL MODELS
(Every 96,000 km or 48 months)
Replace spark plugs (Platinum)

ALL MODELS
(Every 102,000 km)
Replace timing belt

SPECTRA
(Every 12,000 km or 6 months)
Replace HVAC air quality filter (if equipped)

MAGENTIS
(Every 12,000 km or 6 months)
Replace HVAC air quality filter (if equipped)

(Every 60,000 km or 30 months)
Automatic transaxle service

SPORTAGE
(Every 36,000 km or 18 months)
Transfer case, differential & manual transaxle service
Transfer case & differential service (auto. trans. model)

SORENTO
(Every 36,000 km or 18 months)
Transfer case & differential service

youi reset service interval ,done one a while back but i cannot remember what i done ,i know i had to use the radio controls to di ,i held the onboard display on and went to settings then done something and the it reset the service interval i also reduced the service interval to 6000 miles

2003 Nissan Altima 2.5 S maintenance manual says 60 k miles or 48 months to flush the coolant and replace it. 105 k miles or 84 months replace the timing belt.

If there is no loss of Coolant, which is a sign of Head gasket failure to the combustion area, which generates white smoke, I would recommend after 4000 miles of your mileage alone, a complete Service of Engine Oil and filter, AIR filter and Fuel filter.
An inexpensive way to find a recurring combustion problem, At 60k miles, the Spark plugs should still be good, but pull them anyway, just to confirm.
Regards,DT

No. It's never a good idea to take your car to the dealer unless is a problem that falls under an electrical or physical malfunction that would be still under warranty. A standard oil change and tune up on a well maintained vehicle shouldn't run you over $100-$150 at most.

Tune ups, clean oil & filters , tire air pressure at rated as specied on door panel. good driving habits.. have dealer ck computer settings

check engine light has nothing to do with oil level. Only the red engine light does. It sounds like you are burning a lot of oil and it is poisoning your catalytic converter. Your converter is killing itself trying to treat all the unburned oil that is coming to it. It will get so hot that it swells inside and clogs it up. Why you are burning oil is the question. Only 3 possibilities. Past the piston rings, past the valve stem seals or a plugged pvc valve and its hoses. Clean the PVC hose and change the PCV first. Changing the cats now will just kill them again until you fix the oil burning.
Autozone will do free scan test for fault codes by the way.
PCV won't show up there though.
You can buy cheap engine on ebay or at car-part.com. page with asterisk is lowest price.

Don't forget to change the filter with each oil change. When you change the oil, the soot from combustion sticks to the inside of the motor and does not all come out with the oil. Also there is always a little old oil here and there in the motor that does not drain out, and that will give it's color to the new oil. You can have your motor rinsed, but it is more important to change the filter regularly. Stay with one brand of oil, don't switch around. You can change the viscosity (30w/40w) from summer to winter. It's not a great idea to have thick oil in a motor if it gets below freezing outside. A rattle can be a heat shield coming loose, you'll have to have help to find it.

it will be a belt