Skip the auto shop - Our mechanics make house calls

P0114 OBD-II Trouble Code: IAT Sensor Circuit Intermittent Input Problem

Check engine light

P0114 code definition

Intake Air Temperature (IAT) sensor circuit intermittent input problem

What the P0114 code means

P0114 is the OBD-II generic code that the engine control module (ECM) has recorded the IAT sensor input intermittently.

What causes the P0114 code?

The IAT sensor input to the ECM is very erratic or is alternating between shorting and an open circuit.

What are the symptoms of the P0114 code?

  • The ECM turns on the Check Engine Light and goes into a failsafe mode.
  • Intermittent hard starting
  • Fuel mileage varying from good to bad depending on sensor values
  • Exhaust having black smoke out of the tailpipe on acceleration
  • Engine may have pre-ignition and run lean

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 P0114 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 see if there is a disconnected or loose electrical connector to sensor

  • Looks at harness and connector for a short to power

  • Observes the sensor’s live data on the scanner while doing a wiggle test for an open or short circuit in the wiring, connections or sensor

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 P0114 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 P0114 code?

  • The P0114 code will cause the engine ECM to go into a failsafe mode.

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

  • Driving the vehicle for an extended time with the vehicle in failsafe mode may require additional repairs to remove carbon or repair possible ignition problems.

What repairs can fix the P0114 code?

  • Repairing or replacing the IAT connector to fix shorts or the open circuit caused by corrosion

  • Repairing or replacing the wiring as necessary to fix shorted or open circuits in the harness

  • Replacing the IAT with a new sensor

Additional comments for consideration regarding the P0114 code

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

  • Most intake air temperature sensor problems for code P0114 are failures from damaged or corroded harness connectors and the sensors failing internally.

Need help with a P0114 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

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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.


Post a question and get free advice from our certified mechanics.


More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
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...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...

Related questions

Q: Check engine light - O2 sensor circuit + speed sensor circuit...

Hi there. O2 sensor low voltage can be caused my a number of things. Mass air flow sensor was only one of them. It can be a bad O2 sensor, coolant temperature sensor, or wiring issue. What should be...

Q: Gauges fluctuate wildly then car turns off.

Hello. Though there are a lot of common issues that can cause this, the most common is a voltage issue. Low voltage will cause each of these symptoms and codes you are getting. I usually start by testing the ignition...

Q: Which sensors are most important for monitoring and improving the engine’s performance?

The way modern electronic engine control systems are designed, all of the sensors are important but some are more crucial to the vehicle than others. For example, if the engine electronic control unit (ECU) loses the input from the coolant...