P0113 — Intake Air Temperature High Input

What does P0113 mean?

P0113 is set when the ECM sees the intake air temperature sensor signal voltage above the calibrated maximum — typically a reading that would represent an unrealistically cold air temperature (often below −40 °F / −40 °C). This is the textbook fingerprint of an open circuit at the IAT sensor: a disconnected sensor, a broken signal wire, or a failed sensor element.

What are the symptoms of P0113?

• Check Engine Light is illuminated
• Slightly harder cold starting in some cases
• Mild reduction in fuel economy
• Reduced power under hard acceleration (engine adds extra fuel for "cold" air)
• Often no noticeable drivability problem at all

What causes P0113?

Repair costs are typical US ranges and vary by make, model, model year, and labor rate. A diagnostic trouble code is a symptom, not a guaranteed failed part — confirm the root cause before replacing anything.

Is it safe to drive with P0113?

In most cases a vehicle stays drivable for short trips with P0113 active, but you should diagnose and repair it promptly. This is a low-severity code — ignoring it can lead to further damage or a failed emissions test. Exact tolerance depends on your specific make and model.

How to diagnose P0113

1. Confirm where the IAT sensor lives on this engine

   Modern engines fall into two configurations: a standalone IAT sensor in the air intake tract, or a combined MAF/IAT assembly where the IAT element is built into the mass airflow housing. Both share P0113 — the diagnostic difference is where to find the connector and which wires carry the IAT signal.

   Tools: Vehicle-specific service information

2. Read IAT temperature on the scan tool

   A working IAT reads close to ambient air temperature when the engine has been off long enough to cool. Compare to the coolant temperature reading at cold start — they should agree within a few degrees. An IAT reading of "−40 °F" or "−40 °C" is the classic open-circuit fingerprint.

   Tools: Scan tool with IAT PID

3. Inspect the connector and wiring

   Unplug the IAT connector and inspect for corrosion, water, or bent pins. With the connector unplugged and the key on, the scan tool should still report a fixed "very cold" value — that confirms an open circuit signature is what set the code.

   Tools: Electrical contact cleaner, Flashlight

4. Bench-test the IAT sensor with a multimeter

   With the sensor removed, measure resistance across its terminals at room temperature. Compare to the service manual — most NTC IAT sensors read 2.0–4.5 kΩ at 68 °F (20 °C). Infinite resistance means the sensor is open and dead. Heating the sensor gently should cause resistance to drop.

   Tools: Multimeter, Heat gun or hair dryer (optional), Service spec sheet

5. Jumper test the signal wire

   With the IAT disconnected, briefly jumper the signal wire to ground and observe the scan tool reading — it should swing from "very cold" to "very hot" (P0112 territory). If the reading does not change, the wiring or PCM input is at fault rather than the sensor.

   Tools: Jumper wire, Scan tool

How do I fix P0113?

• Reconnect the IAT or MAF-IAT connector
• Replace the IAT sensor (standalone) or the MAF/IAT assembly
• Repair broken IAT signal wire
• Clean corroded sensor connector pins

P0113 by make and model

Select your exact year, make, and model below to get a P0113 diagnosis tuned to your vehicle's known failure patterns, recalls, and TSBs.

Related diagnostic codes

• P0101 — MAF Sensor Range / Performance
• P0102 — MAF Sensor Low Input
• P0420 — Catalyst Efficiency Below Threshold
• P0300 — Random or Multiple Cylinder Misfire
• P0171 — Fuel System Too Lean (Bank 1)
• P0440 — EVAP System Malfunction (Generic)

Common symptoms of P0113

P0113 often shows up as one of these symptoms. Start from what your car is actually doing:

• Reduced engine power / limp mode
• Poor fuel economy