300M, Concorde, LHS, New Yorker Discuss the Chrysler LH platform cars within.

Ambient temperture sensor failure

  #1  
Old 11-15-2014, 02:36 PM
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Default Ambient temperture sensor failure

Ok, so I have a 2000 300m that has no heat. The atc unit at first was dark, but found that wires on the back are loose. I ran the test and it came up with code 25 - "Ambient temperture sensor failure".

Here are my questions:

1. will this cause the no heat issue????

2. where the hell is the sensor located???

thanks

Dan
 
  #2  
Old 11-16-2014, 01:26 AM
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no it will not it just outside temp that's all. Check for low coolant first
 
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Old 11-16-2014, 06:16 AM
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coolant is up and car is running great, both heater hoses are warm, so I figure that the heater core is not plugged... Now I see that there is a small sensor near the fan switch, could that be blocked? Also the display panel does not show a temp, it only shows dashes.
 
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Old 11-16-2014, 11:59 AM
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ok, this may be a little strange, but, I also had a check engine light on for P0442, so i changed the gas cap, and pulled off the neg terminal for a couple of minutes. When I put the cable back on, I now have heat and everything is working great. I ran the test again on the atc unit and now got codes 26 & 36, which I'm guessing because I had unplugged the atc unit(code 36) while the car was running, and having cleaned the in-car temp sensor. Does anyone have an idea how to clear them? or do they clear after some time?
 
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