What Does P0113 Mean?
The ECM has detected that the Intake Air Temperature (IAT) sensor on bank 1 is producing a voltage signal above the expected maximum threshold. On an NTC thermistor sensor, high voltage corresponds to an implausibly low temperature — typically -40°F (-40°C) or lower. This almost always indicates an open circuit rather than actual extreme cold. The ECM will substitute a default temperature value for fuel and spark calculations.
Common Causes
30%
Disconnected or loose IAT sensor connector
25%
Open circuit in IAT sensor wiring (broken wire)
25%
Failed IAT sensor with open internal thermistor
15%
Corroded or spread terminal pins in the IAT connector preventing electrical contact
5%
Open 5V reference or signal ground wire at ECM connector
Diagnostic Steps
1
Check live data — an IAT reading of -40°F (-40°C) confirms an open circuit condition on the IAT sensor input.
2
Verify the IAT sensor connector is fully seated and locked. Disconnect and inspect terminals for corrosion, spread pins, or green oxidation. Reconnect and recheck live data.
3
Measure IAT sensor resistance across its two terminals. At room temperature (68°F/20°C), expect 2.0-3.0 kOhms. An open reading (infinite resistance) means the sensor has failed.
4
If the sensor resistance is correct, check wiring continuity from the sensor connector to the ECM connector on both the signal wire and the ground return wire.
5
Temporarily jumper a 2.2 kOhm resistor across the IAT sensor connector pins. If the ECM reads approximately 68°F, the wiring and ECM are good — replace the sensor.
Estimated Repair Cost
$15 - $125
Parts + labor, varies by vehicle and location
The ECM has detected that the Intake Air Temperature (IAT) sensor on bank 1 is producing a voltage signal above the expected maximum threshold. On an NTC thermistor sensor, high voltage corresponds to an implausibly low temperature — typically -40°F (-40°C) or lower. This almost always indicates an ...
The most common cause of P0113 (Intake Air Temperature Circuit High Input Bank 1) is: Disconnected or loose IAT sensor connector
Typical repair costs for P0113 range from $15 to $125, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. The ECM will use a default temperature value. Fuel economy and cold-start quality may be slightly diminished. No immediate safety hazard.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0113 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel / Air Metering
Difficulty
Type
Generic (SAE)
Recommended Tools
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