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P0113 — Intake Air Temperature High Input

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.

P0113 means intake air temperature high input. A vehicle usually stays drivable short-term with this code, but it should be diagnosed promptly. The most common cause is disconnected or unlatched iat / maf-iat connector (typically $0–$50). Causes and cost vary by make and model; confirm the root cause before replacing parts.

Severity: low powertrain Safe to drive (short term)

Reviewed by MECH AI Editorial · Last verified

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?

What causes P0113?

Cause Likelihood Estimated repair (USD)
Disconnected or unlatched IAT / MAF-IAT connector Most common $0–$50
Open circuit in the IAT signal wire (broken, chafed, or pinched) Common $80–$350
Failed IAT sensor element (open internally) Common $30–$150
Corroded sensor connector pins Common $30–$200
Damaged sensor body from intake backfire Occasional $30–$200
Failed PCM input (extremely rare) Rare $400–$1,500

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?

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P0113: frequently asked questions

What does diagnostic trouble code 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?

Disconnected or unlatched IAT / MAF-IAT connector (most-common). Open circuit in the IAT signal wire (broken, chafed, or pinched) (common). Failed IAT sensor element (open internally) (common). Corroded sensor connector pins (common). Damaged sensor body from intake backfire (occasional). Failed PCM input (extremely rare) (rare)

Is it safe to drive with P0113?

In most cases a vehicle stays drivable for short trips with P0113 active, but it should be diagnosed and repaired promptly — this is a low-severity code. Ignoring it can lead to further damage or a failed emissions test. Specific tolerance varies by make and model.