Loose, corroded or damaged connector at the intake air temperature sensor; Intermittent open circuit or chafed wiring in the sensor signal or ground wire; Failing intake air temperature sensor with an internal intermittent fault; Water ingress or contamination in the sensor connector or sensor body; Poor connection at the engine control unit connector pins or shared sensor ground; Integrated sensor in the mass airflow meter or intake housing failing, depending on model and engine; Fault inside the engine control unit.

P0114

Intake Air Temperature Sensor 1 Circuit Intermittent Bank 1.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
1: AreaFuel and air metering
14: FaultThe specific fault in that area

What it means

P0114 means the engine control unit has seen the signal from intake air temperature sensor 1 (bank 1) jump or drop intermittently, rather than staying steady or failing outright. The reading changed faster than real air temperature could change, or briefly went out of range, which points to a fault that comes and goes in the sensor or its circuit.

Symptoms

Engine warning light on, sometimes coming and going
Hesitation or uneven running that comes and goes
Rich or lean running, with poor fuel economy
Hard or long cranking when starting, particularly from cold
Rough idle or occasional stalling
Cooling fan or other temperature-based strategies behaving oddly on some vehicles

Possible causes

Loose, corroded or damaged connector at the intake air temperature sensorlikely
Intermittent open circuit or chafed wiring in the sensor signal or ground wirelikely
Failing intake air temperature sensor with an internal intermittent faultlikely
Water ingress or contamination in the sensor connector or sensor bodypossible
Poor connection at the engine control unit connector pins or shared sensor groundpossible
Integrated sensor in the mass airflow meter or intake housing failing, depending on model and enginepossible
Fault inside the engine control unitrare

How to diagnose

Read all stored and pending codes and note the freeze frame data, including engine temperature, load and speed, when the fault was logged
Inspect the sensor, connector and wiring for damage, corrosion, water, chafing or poor pin tension, and check the sensor is fully seated
With the engine cold, compare the live intake air temperature reading with ambient and coolant temperature; they should be close
Watch the live intake air temperature value while wiggling the connector and harness and tapping the sensor, looking for sudden jumps or dropouts
Check whether the sensor is a separate part or built into the airflow meter or intake pipe for the model, and follow the manufacturer's procedure
Measure the sensor resistance against the manufacturer's temperature table and compare it with the live reading
Check the reference voltage, signal and ground wiring for continuity, resistance and shorts, including at the control unit connector
Clear the codes after repair and road test, confirming the live reading is stable and the fault does not return

How to fix

Clean, repair or replace the damaged or corroded connector and terminals
Repair or replace the damaged section of wiring, restoring a good signal and ground connection
Replace the intake air temperature sensor, or the airflow meter or housing if the sensor is integral
Dry out and seal the connector, and correct the source of any water ingress
Repair the control unit connector or shared ground fault found during testing

Can I keep driving?

Low severity

The car can usually be driven, but get it checked soon as the control unit may use a default temperature, causing poor running and higher fuel use. If it starts running badly or stalling, limit driving until it is fixed.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.