P0112 — Intake Air Temperature Sensor Circuit Low Input
Category: Powertrain Severity: Low
Updated:
DTC code P0112 means: Intake Air Temperature Sensor Circuit Low Input. It falls under the "Powertrain" category, with an estimated severity of Low. Common causes include shorted IAT sensor, signal wire shorted to ground and moisture-damaged sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Shorted IAT sensor
- Signal wire shorted to ground
- Moisture-damaged sensor
Symptoms
- Check engine light
- Slightly lean mixture when cold
- No symptoms in most cases
How to diagnose it step by step
- Read IAT on the scan tool.
- Unplug the sensor and watch the reading.
- Check the wiring.
- Replace the sensor.
How to fix it
Low input means the ECU sees a very high temperature. Unplug the sensor: if the reading drops to -40, the sensor is shorted; if not, the wire is at fault.
Estimated repair cost
$15–70 (up to $300 if built into the MAF).
Frequently asked questions
What does DTC code P0112 mean?
Intake Air Temperature Sensor Circuit Low Input.
Is code P0112 serious?
Severity Low. Usually a minor fault; check the causes listed.
Can I keep driving with code P0112?
Yes, it is safe to drive.
Related codes
P0113 P0110 P0115 P0116 P0117 P0118 P0108 P0107 P0106 P0120
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