Help me identify this plug... 3 Prong Temp sender to ECU

[sschin]

I been getting the 1223 code... I haven't checked the resistance of the plug yet tho because i don't have an ohm meter.

I pulled out the fuel rail and took the connector out and looked at it... its pretty clean... not messed up or dirty... but ran into some issues because I want to replace the sensor and see if it helps the cold starts and low temperature coolant. I changed the other plug that sends the temerature to the gauge already like 4 months ago. I found out the problem is cold starts. If engine is cold the idle bounces when I release the gas. Once the engine is warm and up to operating temp it idles like normal.

The sensor is suspose to be a 2 prong plug but for some reason it is a 3 prong...
Does anyone know the part number for this plug? I want to replace it and I checked on the ETK and nothing comes up. I even went to the dealer and brought a picture and they can't identify the part. It says 350 bosch on it but no part number.




This is the plug its suspose to be:

Why would the previous owner change the plug to this type and have 3 wires to it now?


1989 E30 325i, 5-speed Manual

[rs4pro3]

What are the wires colors going to the 3 pronged plug? and is the sensor it self 3 pronged also?

[sschin]

I'm not sure what color the wires are. The sensor is the black thing the arrows are pointing to. It has three teeth. It suspose to be 2 teeth prong.

Do you think I could put a 2 prong sensor and new wire connector on it if the colors are the right ones and leave a blank wire loose?

I'll check what colors the wires are after i get off work.

But no one can identify this plug part #?