02 sensors wiring 2004 hyundai. have a universal 02 sensor doesn't have same amount of wires.

You return it and buy the correct one to fit your car

I think the 2004 Accent only came with a 1.6 liter engine as far as I know. In any case below is as much information I have as far as your code including a wiring diagram of that circuit (CMP sensor). The wiring diagram doesn't tell the wire colors but does tell you where the wire goes or what "pin" number it is at the connectors. I included the connectors which is by number and marked the ECM connector for you. I had a picture of the CMP sensor location but not the ECM location but can tell you the ECM connector is located behind the dash fuse panel. Hope this helps....

You do not order anything

You DO NOT BUY a universal O2 Sensor

You go to NAPA Etc & buy the OEM Correct
Sensor,with the right length wires & just install it.

You don't replace the rear monitor or back sensors,
just the front ones,closest to the engine & only at
100,000 miles or when they fail

You should be testing any sensor before you replace one.

If you got a Code ,that doesn't mean you replace a sensor

This is the sensor downstream, near the transmission. This is the more difficult of the two only because of the location of the wiring. It's wired into a plug near the top of the tranny, but not too bad. The one upstream, in the engine compartment is in plain view when leaning over the passenger side fender. You can rent a special 02 sensor socket, has a slot on the side of it for the wiring. Other than that, their both pretty straight forward. Don't forget to put a small amount of anti-size for future work.

wiring instruction come in the box

Your transmission is slipping which can cause a huge amount of damage both to the car and your wallet. Take it in for service as soon as you can.

Typcally caused by one of the front oxygen sensors or a bad ground associated with these sensors.Replace both front sensors with direct fit type NOT universal, because there may be a cracked wire and the universal sensor does not contain the complete wire harness. Direct fits, are about $20 more than universal fit type.

The O2 sensors have integrated heating elements that bring them up to the proper operating temperature. Code P0431 indicates that the O2 sensor on your driver side catalytic converter is not reaching the proper operating range. The O2 sensors are usually in the $150 range online.

Had the same problem You need to go to dealer and order an O2 sensor with California emissions. The wire will be longer and fit into the prong

Check the wiring very carefully. A damaged wire can give he same code. Be sure there are no exhaust leaks.

there is two wires then suposed to be same color they are not what you looking for but if you have a grey and a black wires it willl be one of those i hope and this help