Code 175 service engine light came with this code 175

NO ENGINE TOLD ! 2.0 OR 2.5LITER?????????
TH 8TH DIGIT OF YOUR VIN TELLS YOU WHICH ENGINE IS THERE, PLEASE TELL THAT FIRST.
The alternator is overcharging. what makes you think so?
a meter test.?
scan tool shows DTC that said that>?
OK JUST FLICKER,
lights flicker, what light, heads, or charge lamp error
or what? (i guess all)
putting in 3 wrong alternators is painful , there are 2 used, here. on 2 engines
one is pcm controls, other is not.
The 2 engines and matching ALTs:

DURATEC -VE 2.5LITER ONLY

ZETEC-VCT 2.0L ONLY

THEY ARE NOT THE SAME. ALT ! NOR ENGINES

DURA HAS 3 FUSES TO BLOW. BOTH ALTS USE THESE FUSES
F30-CJB. 7.5a, CENTERAL JUNCTION BOX.
and F2 =BJB, 15AMP BATTERY JUNC. BOX BJB
AND FB 175 AMP
THE REG IS INSIDE THE ALT HERE, NOT PCM

DID YOU REPLACE THE ALT WITH THE NEG LUG ATTACHED, IF YES, THE 175AMP FUSE IS BLOWN BOOM

ZETEC USES PCM REGULATION

AND SAME 3 FUSES TO FAIL, 1,2,3..

THE 175 FUSE MUST BE GOOD. TOO.

THE CORRECT GENERATOR FOR YOU ENGINE MUST BE USED
THE DURA and zetec alternator gens can NOT be mixed up here ever!

best way to buy any alt is by VIN # code or fail 1/2 the time or even 3times in row. or 175amp is blown
if buying over the counter (a new alt) tell them there 2 kinds used in 2000, tell them the vin 8th code.

the temperature sensor can cause a rich mixture at the wrong time by providing a false reading of cold engine

PO420 & PO430 --are worn out Exhaust Converters

You can research any Generic OBD2 Codes on the
internet & learn more than you need to know

A Converter is only good for 12 years & will only pass
inspection MAYBE for 14 years

O2 Sensor Codes are PO170 thru PO 175, so you
may want to study on your own, as you were given
useless advice

Code 191 is fuel pressure range-performance.
Code 172 and 175 are O2 sensors reading rich.
Codes 1132 and 1152 are O2 sensors not switching.
Under normal conditions, the fuel pressure should be around 40psi.
The pressure sensor is reading the pressure is too low or too high.
The O2 sensors should be switching back and forth between lean and rich. They are both staying rich.
Based on that info, I would reason the fuel pressure regulator has failed, or the return line to the tank is plugged.
The engine is getting too much fuel and the computer can't control it.

The check engine light monitors the emission system.There are a lot of sensors on your engine that can light up that light.Usally if lights on but car is running fine its a sensor going bad.But it could be somthing simple like loose gas cap or it could be an clogged injector.All these things are checked by your cars computer.For example I have a vw jetta the light would come on every 200 or 300 miles.I have a code reader and it kept coming up fuel rich in bank one,come to find out i had a small exhaust leak before converter, fixed leak and code went away.You can buy code readers online for 50 to 150 bucks.these will tell you what code and you look that code up in a book and it tells you what to look for.There are more exspensive ones that tell you code # and give description of problem but there in the range of 175 and up.The good thing about most of them is you can reset light after you fix problem and if light stays off your good.Beats bringing car to dealer and paying 100 bucks just to read code and then you still have to pay for repairs.If your mechanicly inclined pick your self up one,you will save your self a lot of future headaches.Good Luck.....

The check engine light is not a big cause for concern. Most of the time it relates to emmision controls or engine controls, but it will not die on you from one of these conditions. Simply get a auto parts store to pull the code for you and find out what is causing the light to come on. I know Autozone pulls codes for free, once you find out what is tripping the light we can go from there on fixing it. If you do manage to reset the light if the problem is still there the light will return. What happened earlier was the cars computer reseting and relearning the idle speed.

www.engine-light-help.com/generic-check-engine-light-codes.html

I say as long as it runs ok and there are no codes coming up that set off the check engine lite, just keep driving.

more info ,or service it

look for vacuum leaks the last 4 codes are lean codes
primarily lookm at the pcv hose noturious for collapsing