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Ambient Air Temp Sensor?

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  #1  
Old 12-21-2005, 02:32 PM
mike_302 mike_302 is offline
 
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Default Ambient Air Temp Sensor?

I have an 05 Dodge Grand Caravan I bought a couple of months ago, I got a check engine light last week and took it to the dealer who told me the ambient air temp sensor got knocked off while driving?!

Now I am new to mini vans, I drive a mustang the van is for my wife, but the only air temp sensor I know of would be part of the mass air flow assembly? If thats the case what would it be doing on the bottom of the car in the first place?

I know the engine code was 0071 which I pulled using the key trick, the dealer would not confirm what the code meant until I brought it in then they tried to charge me $90 even though it is under warranty. Which I am not going to do.

Any help would be appreciated, is this sensor what I think it is? Does it do something else entirely? How hard is it to replace, and where can I find one, I have checked Autozone and Parts america and they can't seem to find one.

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  #2  
Old 12-22-2005, 10:17 AM
brandoncrone brandoncrone is offline
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Default RE: Ambient Air Temp Sensor?

P0071 is ambient temp sensor performance. The sensor is located behind the front bumper, down at the bottom in the center of the vehicle. You can see it from the front of the vehicle through the holes in the bumper. Its probably a bad sensor as you would have to practically destroy the front bumper to damager the sensor. Also Chrysler products don't use mass air flow sensors (except the mitsubishi cars)
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  #3  
Old 12-30-2005, 09:00 PM
mike_302 mike_302 is offline
 
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Default RE: Ambient Air Temp Sensor?

Thanks, the dealer I ended up taking it to here in Indy told me the sensor was hit by a rock and was gone? He also said it was on the exhaust so I got the feeling he was full of it.

Gonna go try to find a replacement at Autozone, appreciate the help.

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  #4  
Old 12-31-2005, 01:53 PM
brandoncrone brandoncrone is offline
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Default RE: Ambient Air Temp Sensor?

I looked at my 05 T and C and you would have to destroy the bumper to break on the sensor, its fairly well protected. I don't understand why they just won't replace it, its a new van.
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  #5  
Old 01-28-2006, 06:57 PM
mike_302 mike_302 is offline
 
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Default RE: Ambient Air Temp Sensor?

I just wanted to post up that the sensor ended up costing me $6.95 and it is right where you said it would be.

I am pretty pissed that the dealer was going to charge me almost $100 to replace it considering it took about a minute and a half to replace.

Right about now I'm pretty glad I did not give them the $1500 for the extended warranty, I think I'll just get used to working on this thing myself now.
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  #6  
Old 01-28-2006, 08:18 PM
acmectec2001 acmectec2001 is offline
 
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Default RE: Ambient Air Temp Sensor?

Is this the same sensor that tells the temperature on the overhead console? My console temp (outside tempurature reading) reads way off and I noticed that the little sensor behind the license plate is cracked. Where did you get one for $6.00?
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  #7  
Old 01-28-2006, 10:33 PM
mike_302 mike_302 is offline
 
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Default RE: Ambient Air Temp Sensor?

Got it from the dealer, could not find anyone that sold them other than the dealer parts counter.

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  #8  
Old 01-20-2009, 02:08 PM
JDodge JDodge is offline
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Need help - I got this same code ( P0071 Ambient Temperature Sensor Performance / Rationality) on my 2007 Dodge Caravan that is still under warranty with 24K miles. Dealer showed me the sensor and the plastic that holds it was broken. It was apparently hit by a rock or stick. The sensor itself looked undamaged. Dealer claimed warranty would not cover since it was broken and wanted to charge $130 to have the sensor replaced.

I asked how do you tell if the existing one is still good. Dealer said there was no way to know for sure and If I did the work myself by installing a new one, the van would not recognize the new one, or the existing one if still good for that matter, becasue the van would have to be reprogramed regardless.

I left becasue I saw on this post that Mike 302 replaced the sensor himself and did not mention reprograming. So, does anyone know if the vehicle really needs reprograming or not? I've driven 40 miles since and the check engine light has not come back on yet.
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  #9  
Old 01-20-2009, 05:59 PM
rabbler rabbler is offline
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You don't need to relearn anything.
Just replace the sensor and clear the code.
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  #10  
Old 01-20-2009, 07:02 PM
JDodge JDodge is offline
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Thanks Rambler - so no need to reprogram?......I replaced the original and looks like the dealership cleared code........no "check engine light" so far. I think the sensoer was hit and the plastic that holds it broke. I hope the sensor itself is undamaged.

What exactly does that sensor do? Is it the same temp sensor that lets the engine know the temp of the outdoor air so that the proper amount of air/gas is introducted into the engine?
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  #11  
Old 01-21-2009, 01:44 AM
rabbler rabbler is offline
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If you have the over head compass the sensor will read outside temp for that display.
It is also used for A/C operation, charging system operation, and for checking the coolant temp sensor calibration.
There is a separate air temp sensor in the rubber hose between the air filter and throttle body. That's the one the engine uses for fine tuning.

Did your old sensor break around the hole that bolts it on? I've seen stuff like that break if someone over tightens the nut.
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Last edited by rabbler; 01-21-2009 at 01:46 AM..
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  #12  
Old 01-21-2009, 01:25 PM
JDodge JDodge is offline
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"Did your old sensor break around the hole that bolts it on?"
Yeah, that is where it broke. It appeared the only part damaged was the plastic on the side where it attaches. The sensor itself looked unharmed.

"It is also used for A/C operation, charging system operation, and for checking the coolant temp sensor calibration."
I didnot replace the original. So far no engine light. What things should I look for if it is bad? I gues #1 the check engine light will come back on. But if it is faulty then how will it affect AC operation, charging system operation and coolant temp. sensor calibration. I've had the van for a year and it always seems it takes a while for the heat to kick in.
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  #13  
Old 01-26-2009, 10:21 PM
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Quote:
Originally Posted by mike_302 View Post
I just wanted to post up that the sensor ended up costing me $6.95 and it is right where you said it would be.
Thanks for posting a follow up - I always appreciate it when folks let us know what the problem was.
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  #14  
Old 06-06-2009, 03:39 AM
angelina1982 angelina1982 is offline
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yeah, I would like to know b/c my inside console will say -40 degress out side and it really 80 degress. autozone told me that means the ambient sensor bad, that might be my replay fans are not wokring could this be true..???
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  #15  
Old 01-30-2010, 11:06 AM
Bruce Senst Bruce Senst is offline
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Default ambient air temp sensor

Thanks rabbler. Have a 2007 Town and Country. We had a snowstorm and going down the street I went thru the snow the plow had left by the main drag. needless to say it ripped off the plastic valance below the front bumber. Later upon my retrurn I saw a plastic piece in the street. Looked at the van and figured it could be mine. Of course, as I was walking to the corner, another car made the turn and ran it over. Sure enough it was of my van. A few days later, I noticed a wire was hanging down, thought maybe it was a light bulb off the valence.

About a month later the check engine light came on. At the end of the wire was what appeared to be a broken light but it was actually the ambient air temp sensor. Local parts store didn't have one. Went to the dealer and was blown away when they had one in stock and it only cost $2.85 plus tax. Unhooked the battery to clear the check engine light and it is fixed. Thanks for the thread DodgeForum.
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  #16  
Old 08-04-2010, 01:30 PM
cblegy cblegy is offline
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Default 97 ram ambiant sensor

i have the check engine light on the code says ambiant air sensor i bought a new one but cant find the old one to replace
not at the bumper,at the side og raditor can anyone help smog is due soon help
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  #17  
Old 08-04-2010, 02:29 PM
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Tizzy1 Tizzy1 is offline
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This is where the ambient temp sensor is located on a '97 ram truck


Click the image to open in full size.
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  #18  
Old 08-07-2010, 11:42 PM
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Quote:
Originally Posted by cblegy View Post
i have the check engine light on the code says ambiant air sensor i bought a new one but cant find the old one to replace
not at the bumper,at the side og raditor can anyone help smog is due soon help
There is not a separate sensor for ambient air on the 97 vans, I rechecked my 97 FSM and there is no information on one. IIRC from either this forum or another one that some of the vans use the battery temp sensor to get a reading. Might even be the Intake Air Temperature sensor.

Have you tried to reset the PCM and see if the code resets?
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  #19  
Old 02-25-2011, 11:18 PM
em2268 em2268 is offline
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I couldn't find the location of the ambient air temp sensor for my 2008 Dodge Grand Caravan; however, I found it and thought I'd help the next guy. It's located towards the center of the vehicle between the one of grills on the bumper. Some may be able to maneuver around the Airdam to gain proper access, but my hands were to big so I had to disassemble half the Airdam.

I was experiencing faulty outside temp readings and engine light was on. According to Autozone, if not replaced the vehicle may experience a failed emissions test, rich or lean running conditions, excessive fuel consumption, and/or skewed temp on indicator.

All in all, it took me about 30 minutes to change out and it cost me a whopping $10 from the parts department at a dodge dealer. Autozone wanted $20 and it was a special order. Originally, it was going to cost me close to $150 if I got it serviced thru the dealer! Glad I figured it out! Hope this helps!!!
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Old 02-25-2011, 11:45 PM
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Old 02-25-2011, 11:45 PM
 
 
 
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