Question about 1997 Chevrolet Camaro
IAT sensor 1 curcuit high input (intake air tempurature sensor) how to replace sensor. most iat sensors are in air hose from air filter, remove wire connector from it. then twist out sensor. they do not cost very much. but if it fails it will cause poor idle when cold, stumble on cold acceleration, and surging when engine is warm.
Posted on Jun 10, 2010
P0113 - Intake Air Temperature Circuit High Input
What does that mean?
The powertrain control module (PCM) monitors the temperature of the air entering the engine. The PCM supplies a 5 volt reference voltage to the Intake Air Temperature (IAT) sensor. The IAT is a thermistor that varies resistance based on temperature. As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.
There will likely be no symptoms other than illumination of the Malfunction Indicator Lamp (MIL - Check Engine Light / Service Engine Soon).
A code P0113 may mean that one or more of the following has happened:
* Internally failed IAT sensor
* Faulty connection at IAT sensor
* Open in IAT ground circuit or signal circuit
* Short to voltage in IAT signal circuit or reference circuit
* IAT harness and/or wiring routed too close to high-voltage wiring (e.g. alternator, spark plug cables, etc.)
* Faulty PCM (less likely but not impossible)
First, if you have access to a scan tool, is there an IAT reading? If the IAT reading is logical then the problem is likely intermittent. If the reading is less than -30 degrees, unplug the connector. Install a jumper wire between the harness connector signal and ground circuits. The IAT temperature reading on the scan tool should be maxed out at the high end. For example it should be 280 degrees Farenheit or higher. If it is, the wiring is okay, and it may have been the connection. If it isn't install the jumper wire between the IAT signal circuit and the chassis ground. If now the IAT reading on the scan tool is maxed out then check for an open in the IAT ground circuit. If you get no reading at all on the scan tool, it's likely that the sensor signal is open or the 5 volt reference is missing. Check using a DVOM (digital volt ohm meter) for a 5 volt reference. If it's there, then unplug the connector at the PCM and check for continuity on the IAT signal circuit between the PCM connector and the IAT connector.
Hope this help (remember rated this).
Posted on Jun 10, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Aug 01, 2017 | Cars & Trucks
Jul 07, 2015 | 2002 Chrysler 300M
Jan 25, 2014 | 1999 Ford Explorer
Aug 08, 2012 | Cars & Trucks
Apr 13, 2012 | 2005 Nissan Quest 3.5
Intake Air Temperature Circuit High Input
It looks like it is related to the IAT sensor or circuit.
For more info, go to this web site/link:
Jul 09, 2011 | 2005 Ford Escape
Oct 17, 2009 | 1998 Ford Taurus
1,238 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: