P0113 Code Meaning and Next Steps

First checks take 10 to 15 minutes for the first checks. No special tools are usually needed for the first checks.

Can you keep driving?

Stop driving if any of these apply

!The engine starts running much worse, stalls, or the warning light flashes.
!The vehicle begins to overheat or lose power sharply while the code is active.

If the light is steady and the vehicle still drives normally: Often yes for a short time, but it should not be ignored.

What to check first

Step-by-step checks

1
Free - no tools
Inspect the IAT connector and harness for an unplugged, loose, or damaged connection
2
Free - no tools
Compare the live reading to ambient temperature when the engine is cold
3
Basic tool needed
Check for heat damage near the harness or a connector that is not fully seated
4
Basic tool needed
If the sensor shares a housing with the MAF, verify the correct signal path before replacing the unit
5
Basic tool needed
If other air-fuel codes are present, treat them as a connected clue

If the code returns

-If the reading looks unrealistically hot, circuit testing is more useful than another visual check.
-If the harness is moved and the reading changes, wiring is more likely than the sensor body alone.
-If the code returns after a replacement, inspect the connector pins and shared reference circuit again.

Background

What this code means

P0113 is a generic OBD-II intake air temperature sensor code.

A high signal often means an open circuit, bad connector, or a sensor that is reporting a hotter-than-real value.

Poor cold-start behavior or odd fuel trimming can show up when the intake temperature reading is too high.

Diagnosis

Common causes

Most common

Open IAT circuit

A break in the signal path can make the reading jump high.

Common

Connector or pin issue

A loose or damaged connector can create an open-circuit-like reading.

Common

Failed IAT sensor

The sensor can drift high internally even if it is still plugged in.

Possible

Heat or wiring damage

A damaged harness near hot engine parts can create the same result.

Avoid these mistakes

What not to do

xDo not replace the sensor first if there is an obvious wiring, connector, or intake issue.
xDo not ignore drivability changes just because the code sounds like a sensor problem.

Parts

Parts that may need replacing

PartTypical costNotes

Intake air temperature sensor$20-$80Relevant when the reading is clearly too hot after a basic connector check.

Connector pigtail repair$15-$90Worth checking if the plug or pins are damaged.

Harness repair$20-$150Relevant if heat damage or an open circuit is found.

Related OBD codes

P0111

P0111 usually means the intake air temperature signal is out of the expected range.

P0112

P0112 usually means the intake air temperature signal is reading too low.

P0101

P0101 usually means the mass airflow signal is outside the expected range or performance window.

Source notes

Generic OBD-II (SAE J1979 / ISO 15031-5). P0113 was expanded around common high IAT signal faults, including open circuits, connector issues, and heat damage.

This guide is written as a generic multi-make reference, so bulletin history, sensor locations, and repair order can still change by manufacturer and engine family.

This is generic OBD-II guidance and should not override vehicle-specific service information. Exact diagnosis and repair steps vary by make, engine family, and model year.

Last reviewed: 2026-04-10

Reference: Open reference

P0113 - P0113 Usually Means the Intake Air Temperature Signal Is Reading Too High