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Threw a CEL - P0113

3511 Views 2 Replies 3 Participants Last post by  TXFO
P0113 - Intake Air Temperature (IAT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The IAT sensor maximum is 4.6 volts or -50°C (-58°F). Open circuit in harness
Sensor signal short to power
Damaged sensor
Improper harness connection
Damaged PCM
IAT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

We had a big G2G this weekend in which I took off my UDP and put the stock unit back. This morning, I reconnect the battery, start the car, and I get a CEL after driving only 1 mile. I checked to make sure the MAF was plugged in, but I don't really know where else to look for problems. Any thoughts?
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Just an FYI here since I didn't know anything about the IAT and had to do some research myself. The IAT sensor is integrated into the MAF sensor. The outside two wires on the connector are the IAT wires. You can get a P0113 code if you start the car with the connector disconnected. Hence, "Open circuit in harness".

Check out this thread for more details.
get a voltmeter and see what the IAT is putting out right at the pin out of the harness. then you know which way to go with this one.
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