Air temp sensor problems - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

95Blue240sx · 03-17-2003, 05:21 PM

I've done search and found nothing on what im dealing with. the problem is i got code 41, air intake temp sensor. so i replaced the sensor and rest the ecu. i start the car and within a minute the check engine light come back on. i check it again and its code 41. so i start the car unplug the sensor and check to see if it is getting voltage, and it is not. so im thinking maybe that it god cut somewhere going to the sensor. im about to go check to see if i get voltage from the line coming out of the ecu. then ill go from there. i do not have an intake or anything. just a drop in filter. but i've had the filter in there for a couple years now and the check engine light came on about 2 weeks ago. help me out. thanks!

s14slide · 03-26-2003, 03:49 PM

just found myself w/ the same problem this weekend. Did you ever find anything??

*AceInHole* · 03-26-2003, 04:18 PM

weird... i ran my car for like a week with the air temp sensor unplugged and didn't get a CEL. although, i think my CEL bulb may be dead

Dousan_PG · 03-26-2003, 04:19 PM

i had the same problem. after replacing it didnt go away
so i checked a few thngs, didnt change or rpelace anything. after driving around for a few hours, the light turned off. go figure.

cars suck.

95Blue240sx · 03-27-2003, 10:46 AM

heres what i did. i checked the voltage on the plug, where the sensor plugs in to. the black is ground the other is hot. so check ground first. get a volt meter and black into the black on the plug and red to positive on the batt. should get a reading like 14v when the car is on. then check voltage from the hot side, blue wire, and ground(any metal on the car/engine) and get like a 5v reading. when i was doing this i did not get a 5v reading on the hot side. so i went to the ECU and checked the voltage coming out of there(i have ECU wiring diagram if anyone needs) it read 5v so i figure the wire is messed up somewhere. so i just soldered in a new wire from the ecu and ran it to the plug then plugged the sensor in, reset ECU and no CEL.

03-17-2003, 05:21 PM	#1
95Blue240sx Post Whore! Join Date: Jul 2002 Location: Girls pee-pee when they see me Age: 41 Posts: 4,084 Trader Rating: (0) Rides Gallery: 95Blue240sx Feedback Score: 0 reviews	Air temp sensor problems I've done search and found nothing on what im dealing with. the problem is i got code 41, air intake temp sensor. so i replaced the sensor and rest the ecu. i start the car and within a minute the check engine light come back on. i check it again and its code 41. so i start the car unplug the sensor and check to see if it is getting voltage, and it is not. so im thinking maybe that it god cut somewhere going to the sensor. im about to go check to see if i get voltage from the line coming out of the ecu. then ill go from there. i do not have an intake or anything. just a drop in filter. but i've had the filter in there for a couple years now and the check engine light came on about 2 weeks ago. help me out. thanks! __________________ Please leave me feedback

03-26-2003, 03:49 PM	#2
s14slide Zilvia Addict Join Date: Sep 2002 Location: Nippon Age: 43 Posts: 630 Trader Rating: (0) Feedback Score: 0 reviews	just found myself w/ the same problem this weekend. Did you ever find anything?? __________________ = My day

03-26-2003, 04:18 PM	#3
AceInHole Autox Technician Join Date: Dec 2001 Location: New Haven, CT Age: 44 Posts: 3,961 Trader Rating: (0) Rides Gallery: AceInHole Feedback Score: 0 reviews	weird... i ran my car for like a week with the air temp sensor unplugged and didn't get a CEL. although, i think my CEL bulb may be dead __________________

03-26-2003, 04:19 PM	#4
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	i had the same problem. after replacing it didnt go away so i checked a few thngs, didnt change or rpelace anything. after driving around for a few hours, the light turned off. go figure. cars suck. __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

03-27-2003, 10:46 AM	#5
95Blue240sx Post Whore! Join Date: Jul 2002 Location: Girls pee-pee when they see me Age: 41 Posts: 4,084 Trader Rating: (0) Rides Gallery: 95Blue240sx Feedback Score: 0 reviews	Problem SOLVED! heres what i did. i checked the voltage on the plug, where the sensor plugs in to. the black is ground the other is hot. so check ground first. get a volt meter and black into the black on the plug and red to positive on the batt. should get a reading like 14v when the car is on. then check voltage from the hot side, blue wire, and ground(any metal on the car/engine) and get like a 5v reading. when i was doing this i did not get a 5v reading on the hot side. so i went to the ECU and checked the voltage coming out of there(i have ECU wiring diagram if anyone needs) it read 5v so i figure the wire is messed up somewhere. so i just soldered in a new wire from the ecu and ran it to the plug then plugged the sensor in, reset ECU and no CEL. __________________ Please leave me feedback