I have a 2007 Vue Redline with a P0113 code. I've replaced the sensor and it keeps coming back. I clear the faults on the ECU and within seconds the code comes back. I've tested the voltage at the sensor and I'm getting voltage so I know its not a broken or grounded/shorted out wire. What else can be causing this?

Jimmy

 

Just because you are reading a voltage at the sensor does not mean the circuit is operating properly. What voltage are you reading across the device?

The code is for an out of range high intake air temperature. Is the i-80 built into the maf or is it stand alone plugged into the air intake ducting?

How dirty is your air filter?

 

I am getting 3.14v across the device. and it is a Standalone plugged in to the intake. The filter is clean.


Jimmy

 

The voltage across the leads with the sensor unplugged bounces between 4.99 and 5V When the sensor is plugged it started at 3.14 and slowly dropped as the engine warmed up. I'm also seeing Intake temps from Torque with my OBDII reader so I know signal is making it back to the ECU. When I clear the ECU I hear the throttle body opening and closing, I'm not sure if that's normal or not on this vehicle when clearing the codes? The P0113 code returns almost immediately after clearing the code without even having to start the vehicle.

Jimmy

 

There's a guy over at Saturnfans that appears to have the exact same issue.
Have you tried getting in touch with them?

 

I love Saturnfans.
20,000 members and not one can be bothered to acknowledge your question let alone try to help.

 

Does it look like this?

Hi, I'm an Air Charge Sensor for a 3.5L Honda V6 engine in the 2007 Vue Redline

 

IS it here?


IAT location 2007 3.5LV6 Vue

 

I'm yet to find a V or Resistance vs temp chart for that sensor; There is obviously a static resistance in the circuit portion that is inside the ECM. So it knows the resistance of the fixed R, then the IAT changes resistance with temp so the V drop across it changes (in this case Temp increase = R decrease as you have seen.. But not a linear relationship for inexpensive thermistors.

I'm going to guess you did not replace it with an OEM GM part.

If you still have the old part, measure its present resistance.
then measure the new part's resistance -- without being connected

are they close?

Make a resistances vs Temp (as read by Torque curve as the engine goes from cold to operating temp. Take readings every I min, 30 sec, I don't know.
Do the same with the original sensor in place.

Same or different behavior?

Hook back up noting which lead is 5V and which is ground.
Check continuity between the ground pin of the IAT and chassis ground. There should be no significant resistance between them. This is a check to make sure the ECM ground pin is really at ground w respect to everything else.

 

Derf,

Thanks for the replies. I did cross-post this over to Saturnfans as well, I wasn't sure which form was more active. My sensor looks a lot different.



I purchased it from Pepboys. No matter where I looked I always came up with the same part, Standard Motor Products AX160.

I'm just getting up and having my coffee, I'll get the old part and compare the resistance and check the ground.


Thanks again for all your help.


Jimmy