Stock ECU error code 09
 

Just did the paperclip test on my 1993 rx7 r1 and I got error code 09 which I think is a water thermo sensor but also a engine Coolant temp sensor anybody know for sure what it is and where the sensor is located. Thanks

welcome to the board. :)

https://www.rx7club.com/3rd-generati...-codes-851414/

yes. it seems to correlate to a possible failure of the coolant temperature sensor.

water thermo sensor = engine coolant temp sensor. its green in the back of the water pump housing.

Thanks
 

I pulled out what I think is coolant temp. Sensor but the new one doesn't fit part #:SU4007 at autozone

for whatever reason the aftermarket has a lot of errors in their listings for just about everything, https://www.mazdatrix.com/93-95Electrical-Engine.htm scroll most of the way down, its the NF02-18-840

Thanks
 

I got it all done Thursday. The 7 is running great