Does a bad O2 sensor make the AIT sensor bad too?

 

Car info?

If it's a 1996-2000, the well known "fuse 15 problem" will cause several sensor codes to appear because the sensors aren't getting power. None of the sensors are actually bad.

 

It's a 95 Honda Civic EX

 

No the o2 has a heater and signal coming from the ecu, the intake air temp sensor (I believe that's what you meant ) is supplied voltage and is a potentiometer to change voltage signal back to the ecu based on temp. So it would not make the IAT bad.

 

OK thanks, just wandering because I replaced it about a year ago and I didn't think it would go bad that fast

 

First, what CEL codes are being displayed?

You sound like you are just shotgunning the problem, which is never cheap nor easy.

 

It's doing one long blink which I looked up and it said it's #10
​​​​the IAT sensor

 

I've never seen an intake air temp sensor go bad before. I've changed a ton of them because people break them when putting engines in the car, but I've never seen one go bad on it's own.


Just throwin that out there.

 

Maybe it's dirty

 

I took it off it looks fine but the code is still coming up.. is there anything else I can do?

 

Per the Helm manual

1. Reset the ECU
2. Does code reappear?
3. If yes, turn the ignition off
4. Disconnect the 2P connector on the TA sensor (IAT)
5. Measure the resistance between the two terminals
6. Did you get between 0.4 and 4.0 kilo Ohms?
7. If no, replace the sensor.
8. If yes, turn the ignition on
9. Measure the voltage between the Red/Yellow (+) wire and a BODY ground.
10. Is there 5V?
11. If yes, measure the voltage between the Red/Yellow and GRN/WHT terminals. If you get 5V, substitute a known good ECU. If you don't get 5V repair the open in the GRN/White between the ECU D22 and the IAT.
12. If no, measure the voltage between D15 and D22 on the ECU (this is normally done with a test harness but you can push paper clips behind the wires into the plug)
13. is there 5 volts?
14. If No, replace the ECU with a known good ECU.
15. if Yes, Repair open/short in the Red/Yellow wire between the ECU (D15) and the IAT