Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > General Discussion Forums > General Tech
Sign in using an external account
Register Forgot Password?

General Tech Good at troubleshooting? Have a non-specific issue? Discuss general tech topics here. IF YOUR QUESTION IS SPECIFIC TO A CERTAIN MODEL, IT DOES NOT GO IN THIS SECTION.

LinkBack Thread Tools
Old 08-21-2007, 02:08 PM
Join Date: Aug 2007
Posts: 1
Default 2000 Mailbu IAT sensor

So, my 2000 Malibu 3.1 check engine light came on, dropped by my local Advance Auto Parts, turns out I'm getting a "IAT Sensor Circuit high voltage" code (sorry, can't remember the exact number, and don't have it with me).

Pulled the sensor, resistance went down as temperature went up. This should be correct fora thermistor, right? What should the voltage be on this circuit? What could cause the high voltage situation, if the sensor is working correctly?

Thanks in advance!!
Register today for free or log-in if already registered to remove this ad!
So, when do we eat?
Reply With Quote
Old 08-22-2007, 04:14 PM
Join Date: Feb 2007
Posts: 254
Default RE: 2000 Mailbu IAT sensor

The intake air temperature (IAT) sensor is a thermistor which measures the temperature of the air entering the engine. The Powertrain Control Module (PCM) applies 5.0volts through a pull up resistor. When the intake air is cold, the sensor resistance is high and the PCM will monitor a high signal voltage on the IAT sensor signal circuit. As the intake air warm, the sensor resistance becomes lower causing the PCM to monitor a lower voltage. If the PCM detects an excessively high IAT sensor signal voltage (low temperature indicated), DTCP0113 will set.
Reply With Quote
Old 08-22-2007, 04:14 PM

2000, 31, check, chevy, engine, iac, iat, indicated, light, low, malibu, resistance, senser, sensor, temperature, test, trailblazer

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Join Chevroletforum
Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 06:56 AM.

Internet Brands, Inc.

Emails Backup