1995 240... obd1 or obd2?

[xweav32]

gov considers it obd 2, but its really obd 1/2. the cars have the diagnostics of an obd2 system, but all the sensors of an obd1. thats why its a crossbreed. as for your swap it probly wont happen im sorry to say. the car is registered as obd2 compliant in cali.

[E7-S14]

i bet you an invisible 1000 bucks you plug is located under the dash on the passenger side by the vents that feed air to your foot well. these are from my dads s14 production date 3/94. here is pics....

thats where mine is.my car was manufactured in 94..as a 95 modeland its OBD I..so... early s14s are OBD1 and later model s14s are OBDII

[xweav32]

does it look like that connector? can you have it scanned?

[TheOne]

95 S14's with 1 wire o2 sensors are obd1, with 3 wire(i believe its 3) its obd2.

they are mostly crossbreeds though.

[Weiland]

I am a state inspector for North Carolina and if it is the same for other places, I can tell you. All 95 and older are OBD1. Some 95s have OBD2 support because they were getting ready for the crossover, but OBD2 didn't become mandatory until 96 for all automakers and states.

[x3whlmotion240sx]

+1

gov considers it obd 2, but its really obd 1/2. the cars have the diagnostics of an obd2 system, but all the sensors of an obd1. thats why its a crossbreed. as for your swap it probly wont happen im sorry to say. the car is registered as obd2 compliant in cali.

yea i got throwen off a little by the ob2 hookup

[Slappy]

obd1

[xweav32]

if anybody actually read what i posted i said that they are ob2 systems with obd1 sensors. basically you have the car scanned by obd2 equipment, but the guts are all obd1. really its an s13 electronics set up with the ability to scan more detailed. thats why its a crossbreed. all s14's have that connector in that location.

[s14tan]

95 S14's with 1 wire o2 sensors are obd1, with 3 wire(i believe its 3) its obd2.

they are mostly crossbreeds though.

ummm... what if you have both?

Header o2 is one wire and downpipe o2 is 3...Cause thats what I have.

[xweav32]

like i said crossbreed. ALL S14's HAVE OBD2 ELECTRONICS.

[Weiland]

Doesn't really matter...all 95 cars are still considered OBD1. Its just some 95 cars (Nissan, Mitsubishi etc.) have OBD2 connectors so they could get ready for when it becomes standard. Also, some early s14's didn't have OBD2 connectors.

[s14tan]

gotcha.Thanks.

[hpmachine]

Well I plan to look into this. Obviously we haven't come to a definitive answer yet. I'm gonna look at some cars soon and then I'm gonna talk it over with a mechanic friend of mine. If there is gonna be any kind of problem with emissions, I'll probably buy another s13. I am dead set on a v8 swap.

[numbnuts240]

i am certified to test emissions here in ct. i'm not going to get involved in the debate as to whether 95's are obd1 or obd2, because frankly i don't have a definitive answer (even though i own a 95, i have never searched for and obd2 port, but i do know for a fact it has an obd1 port). what i can tell you is that here in ct, if i was testing a 95 vehicle, the machine makes the decision as to what type of test the car gets, and being a 95, it will get the sniffer, even if the car has an obd2 port. our machines here only go by model year, so 95 and older=sniffer, 96 and newer=obd2 scan. hopefully for you, jersey is the same way. ok i really have to get back to work now.

[DMan II-40]

lol, this discussion hasn't gotten anywhere yet. Im interested to see the outcome.......if there will be one. I will look at my car and check it out, see if i can provide any info.

[95_240]

95 S14's with 1 wire o2 sensors are obd1, with 3 wire(i believe its 3) its obd2.

they are mostly crossbreeds though.

He is talking about the first o2 sensor. If it has three wires it is obd2 because its a heated oxygen sensor. There is so much misinformation in this thread. The obd1's do not have obd2 sensors. You go by the date of manufacturing on s14's to tell if they are obd1 or 2. I don't remember the date but I read it somewhere on here a long time ago.

[cmfireman]

Come on guys. Is it really this hard to get a definitive answer?

The On-Board Diagnostic Test

The On-board Diagnostic (ODB) test reads a computer system in your vehicle to identify engine-related problems that may result in increased emissions of harmful pollutants. If you maintain your vehicle when you are alerted by your OBD system, you can help improve the state's air quality. (For models earlier than 1996, New Jersey will continue to use the earlier tailpipe-emissions tests during inspection.)

Now how can this be interpreted?? Simple....IF THE CAR IS A 1995 OR OLDER, IT WILL BE SUBJECT TO ONLY THE SNIFFER.

So the question of OBDI or II is completely invalid, and a 1995 240sx will not be subject to emissions testing through an OBD scan.
Modified by cmfireman at 3:39 PM 2/13/2008

[My RB25]

I don't have time to read through this whole thread. But 96+ it became mandatory for all cars to be OBDII. Some 95's MAY be OBDII, this is when they were starting to change over. 94 and under, OBDI. If you go even further back, some early 80's cars and earlier is OBD0.

90% of the time the OBD connector (On OBDII cars) is under the drivers dash. Some german and other manufacturers thought it would be cool to hide the connectors in the back or behind covers. Most of the time if you see a connector under the hood or near the fuse box it's OBDI. Edgar's picture clearly shows the difference between the two. But not all OBDI connectors look like that, most manufacturers used different connectors.

[maj Andres]

I have a 95 se model made in 5/94 that has an obd2 connector under the passanger dash, and yes it works because ive used it before

[goldeneye9mm]

all s14's are obd2. all of the i have an early model s14 from 1995 and the ports is in the same spot as pictured. s13's are obd1.

[ThuG LyFe]

well the op wanted to know in NJ so i guess his question got answered. 95 and older will get the sniffer test.

i guess i learned today that my s14 has obd2 features altho it's obd1...not that it matters to me anyway.

[xweav32]

well the op wanted to know in NJ so i guess his question got answered. 95 and older will get the sniffer test.

i guess i learned today that my s14 has obd2 features altho it's obd1...not that it matters to me anyway.

i told you. here is the conclusion, you can do your motor swap and and only be subjected to the sniffer. all s14's have an obd2 port but in reality are obd1. ive explained all of this. can we end this thread already?

[BoBa524]

i told you. here is the conclusion, you can do your motor swap and and only be subjected to the sniffer. all s14's have an obd2 port but in reality are obd1. ive explained all of this. can we end this thread already?

that's right! OBDII by law is only 96+, some 95 240s were OBDII READY like my car. But an inspection place will only hook up the machine to 96+ cars.

[hpmachine]

Wow this went crazy! Xweav32 you DID tell me earlier that I probably wouldn't be able to do the swap. So... whatever. I had a brief discussion with a mechanic friend of mine today and he said he'd be able to tell me for certain if the car is obd1 or 2 if I got him the VIN # on the car I'm interested in. So that's what I'm gonna do. I'm going to try to buy one in the next month so I'll let you know the outcome.

[BoBa524]

Wow this went crazy! Xweav32 you DID tell me earlier that I probably wouldn't be able to do the swap. So... whatever. I had a brief discussion with a mechanic friend of mine today and he said he'd be able to tell me for certain if the car is obd1 or 2 if I got him the VIN # on the car I'm interested in. So that's what I'm gonna do. I'm going to try to buy one in the next month so I'll let you know the outcome.

lol

1995 - OBDI 1996+ - OBDII

[hpmachine]

good... boba your car is very sechsy

[BoBa524]

spanks...yours is too.

[My RB25]

Here's some food for thought, it just dawned on me. OBDII cars have 2 O2 sensors, one pre (before, upstream) and one post (after, downstream) cat. That alone should tell ya.

[ELEMENT692121]

95 was a split year for alot of manufactures i had 2 95 preludes one was obd1 one was obd 2 depends on the production date .. as far as emissions are concerned obd 2 was not the standard till 96 .. all 96 cars are obd2 some 95 cars are 1 some are 2 .. so if its a 95 youll get the sniffer .. heres a trick though i know in maryland if you car is to low to go on the rollers u get and exemption .. so no test if ur car is lowered a lil bit ..

[hpmachine]

I HATE this thread, and I started it. JEEZ I have a friggin migraine