Skip the auto shop - Our mechanics make house calls

P0113 OBD-II Trouble Code: IAT Sensor Circuit High Input Problem

Check Engine Light

P0113 code definition

Intake Air Temperature (IAT) sensor circuit high input problem

What the P0113 code means

P0113 is the OBD-II generic code that the engine control module (ECM) has recorded the IAT sensor output above expected sensor range.

What causes the P0113 code?

If the sensor output voltage is more than 4.91 V for 0.5 seconds or more, the ECM determines that there is an open circuit in the IAT sensor circuit, and sets trouble code P0113.

What are the symptoms of the P0113 code?

  • The ECM will turn on the Check Engine Light and go into a failsafe mode.
  • Engine may not start as usual
  • Engine may run extra lean
  • Engine may have pre-ignition problems from lean burn conditions

Note: The symptoms are determined by the manufacturer failsafe ECM strategy for the vehicle during a failure and may vary between manufacturers and vehicles.

How does a mechanic diagnose the P0113 code?

  • Scans the ECM, documents the codes received, and views the freeze frame data to see the conditions present when the code was set

  • Clears the vehicle of fault codes and the retests the vehicle to see if the code comes back

  • Performs a visual inspection to check for shorting harness or connector to sensor

  • Observes the sensor’s live data on the scanner while disconnecting the IAT sensor connector to see if the sensor reading goes to -40°F indicating the sensor is shorted

If the sensor is disconnected and input is still 240°F then the short is in the connector or harness.

If no problems are noted, the mechanic performs the manufacturer's specific pinpoint tests for the code and repair as needed.

Common mistakes when diagnosing the P0113 code

  • Not performing a visual inspection of connections and wiring

  • Not following the manufacturer pinpoint test procedure step-by-step and skipping steps

  • Not replacing an IAT sensor only when tests indicate a problem

  • Not connecting a new or known good sensor to the harness and viewing the ECM data to see if the temperature output from the sensor is as expected

How serious is the P0113 code?

  • The P0113 code will cause the engine ECM to go into a failsafe mode.

  • The failsafe mode, depending on the manufacturer failsafe mode strategy, may cause lean condition drivability symptoms.

  • Driving the vehicle for an extended time running too lean can cause internal engine problems with rings and valves.

What repairs can fix the P0113 code?

  • Repairing or replacing the IAT connector short
  • Repairing or replacing the wiring short as necessary
  • Replacing the IAT with a new sensor

Additional comments for consideration regarding the P0113 code

  • The P0113 code is often associated with P0111, P0112, and P0114 codes.

  • Most intake air temperature sensor problems for code P0113 are failures from damaged shorted harnesses or from sensors shorted internally to power.

Need help with a P0113 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...
P0291OBD-II Trouble Code: Cylinder 11 Injector Circuit Low
P0291 code definition When your vehicle’s PCM registers the P0291 code, it means that a voltage reading came from the fuel injector circuit – for cylinder number 11’s fuel injector –...


Related questions

Q: Engine losing power, gas pedal unresonsive

Hello there, a few common faults can cause these type of symptoms. The most common would be the vehicle going into limp mode, a fuel pump problem, bad spark plugs, faulty MAF sensor, a vacuum leak, or faulty oxygen sensor....

Q: U1262 scp data link fault

The code U1262 point out a communication fault between the vehicle modules and a scanner. It may be best to visit your local dealer to find if one of the vehicles control modules has failed. In some cases this can...

Q: Loss of power - 2006 Infiniti G35

Hi and thanks for contacting YourMechanic. Since you are getting different sensors acting up, check all of the connections to all of the sensors and make sure that there is no missing bolts. There could be a vacuum leak causing...