Can i run diagnostic test on an 02 mustang gt just using the car itself? no tools?

limited info generic answer --assume this is a gmc 02 envoy with a battery problem ---check and test battery -alternator and connections ---test for parasite drain ----- https://shoptoolreviews.com/automotive/diagnostic-testing/parasitic-battery-drain/34587/# -----------------

The standard OBD2 P0*** codes are very easy to find. Your can google

1999 Ford Mustang P0095 for exaple and get a full breakdown of the issue and the fix

https://www.google.com/search?q=ford+mustang+obd2+codes

also note you have a '1999 Ford Mustang GT' not a '99 mustang gt'. details matter to Mr Google to get best results :>D ..

is the problem only on a cold engine, hot or both?
is the hot engine reaching and holding 180F or more as it must?>
its running rich
and that is misfire.
lots of causes for rich. the tests are easy in shop with tools.

1. a full tuneup.
2. fuel pressure to high we, use a gauge. (FPR bad?)
3. leaking injectors.
4. ECT failure, scan it and must read 180f, hot, if at 180f hot.?
5. this takes 5 min work on any scan tool (real)
6. map hose clogged. or leaking. the Map sensor must not be blocked in any way to the plenum vacuum. or it will lie and it will run real bad.
7. on a hot engine, the 02 sensors can fail, or is good and the exhaust cracks in the header do that. on mine it did 3 times.

cracks in the exh header, there must not he any leaks in that header (or bad gaskets)
or the 02 lies. , goes to 0volts and then engine runs rich as a piggy. (my scan tool shows this is seconds, 02 flat-lined at 0v.
all cars, with 02 do that. with that issue.
02 means oxygen sensor, the front one, not the rear one.

Door ajar switch is bad or you have a wiring problem ! Which door ?
B1322 Door Ajar Driver Circuit Short to Ground GEM/CTM REFER to Section 417-02 . B1323 Door Ajar Lamp Circuit Failure GEM/CTM REFER to Section 413-01 . B1325 Door Ajar Lamp Circuit Short to Battery GEM/CTM REFER to Section 413-01 . B1330 Door Ajar RF Circuit Short to Ground GEM/CTM REFER to Section 417-02 . B1334 Decklid Ajar Rear Door Circuit Short to Ground GEM/CTM REFER to Section 417-02 . B1338 RR Door Ajar Circuit Short to Ground GEM/CTM REFER to Section 417-02 . Inspection and Verification

1. NOTE: The generic electronic module (GEM)/central timer module (CTM) must be reconfigured upon replacement. Refer to the scan tool help screen on the configuration card to program the tire size and axle ratio.
   The warning lamps are a GEM/CTM controlled system; refer to Section 419-10 .

1. Verify the customer concern by operating the system in question.

1. Visually inspect for the following obvious signs of mechanical and electrical damage.
   
   Visual Inspection Chart Mechanical Electrical
   • Switch(es)
   • Fuse(s)
   • Damaged wiring harness
   • Loose or corroded connections
   • Circuitry
   • Bulb

1. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
   • check that the program card is properly installed.
   • check the connections to the vehicle.
   • check the ignition switch position.

1. If the scan tool still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.

1. Perform the DATA LINK DIAGNOSTIC TEST. If scan tool Tester responds with:
   • CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00 .
   • NO RESP/NOT EQUIP for GEM/CTM, go to Pinpoint Test E.
   • SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for the GEM/CTM.

1. If the DTCs retrieved are related to the concern, go to the GEM/CTM Diagnostic Trouble Code (DTC) Index to continue diagnostics.

1. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.

plug test light, coil packs? pressure test, check heads, valves, fuel injector? going to need a diagnostic on that one, unless you got the tools, take it to the er and get a rundown, anyone with a proper diagnostic computer should be able to do it

If you have a service engine warning light showing up on your instrument cluster go to Autozone and get a free diagnostic test done. They will give you the codes and explanation.

Pull the drive shaft & have a shop that repairs
& balances them, do the diagnostics on that
including the bearing.

Nothing to loose there

I do that with new vehicles,old vehicles,just because
they are bent & flawed from the factory

P0175 : That means your car is running rich in Bank2.

Could be your 02 sensor or your MAF sensor.

Only 99-02 will work on a 2000, and they show a base model airbag and a GT model airbag.

yes, just a spark plug socket and a spark plug gap tool