Hi Jason,
Go into "Adjust"-"Misc Functions" and "Warning Alarms" and check what you have set up for the Aux Temp.
P.S. Can you copy and paste the question from the other forum in future so there is no back and forth for everyone?
"Hey guys,
I have a Motec M4 ECU on my Lancer.
I have 2 AC Delco Air temp sensors, The one before the Throttle, is set as AIR TEMP, The other one at the compressor output is set as AUX TEMP.
I also have AUX OUTPUT 3 as the DRIVER WARNING OUTPUT wired up to the stock check engine light, Now whenever i set the AUX TEMP to the Delco temp sensor, i get a check engine light.
I have connected the laptop and there is no errors, and I cant seem to see any issues anywhere, and the sensor actually reads an accurate temprature...
I have checked all the wiring, and my next test is to swap the temp sensors over and see if some how i have a dud sensor (Even though it reads temp) But I thought i would see if anyone has had this sort of issue before?
Thank you in advance for your time "
Jason