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They is an o2 sensor before and after the catylatic converter. Jack up the front of the car support it with axle stands. Just behind the catalatic converter there is what looks like a bolt with wires coming out of it. That is the down stream o2 sensor. Look for the same thing on the exhuast between the catalatic converter and the engine and you will find the upsteam one. You maybe better off taking it to a garge to get the trouble codes and fix out the root of the problem. Emission parts can be costly. Be gentle when loosening the o2 sensor. Spray the WD40 to it and let it sit over night. If it still doesn't want to come off try tightening it slightly then losening it.
What else can I help you with?
Where is the Mass air flow sensor located in a 1996 Plymouth neon?
A 1996 Plymouth Neon does not have a maf sensor.
Where is the mass air flow sensor location on a 2002 dodge neon?
A Dodge Neon does not have a mass airflow sensor.
Where is the fuel composition sensor on a 1996 dodge neon?
A Dodge Neon does not have any such part.;
Where is the speed sensor located on a 1996 Plymouth Neon?
transmission/ transfer case
What does code 24 mean on a 1996 dodge neon?
Throttle Position sensor out of range
Why does your 1996 dodge neon run and then die?
try oxgen sensor,or pickup modual
Where is the location of the air charge temperature sensor on 2005 dodge neon?
I need to know
Where is the crankshaft sensor on a 1999 Dodge Neon located?
I believe it is located on the block right above the oil filter housing. That is where it is on my 1996 neon.
What would cause the speedometer on a 1996 dodge neon not to work?
i would have to bet on the speed sensor
2003 dodge neon output speed sensor location?
Two wire sensor, front driver side of transmission case.
Where is temperature sending unit on 1996 dodge neon?
It is the two wire sensor near the thermostat housing.
DTC codes P0340 for 1996 dodge neon?
Trouble code P0340 means: Camshaft Position Sensor A Circuit (Bank 1 or single sensor)
