P0114: Intake Air Temperature Sensor 1 Circuit Intermittent/Erratic Bank 1

What does P0114 mean?

Intake air temperature sensor 1 is the first air temperature sensor in the intake path; depending on the vehicle it is built into the mass air flow sensor, mounted near the air filter or, on some naturally aspirated GM engines, fitted in the intake manifold. Most versions are NTC thermistors in a 5 V divider: the hotter the air, the lower the signal voltage. P0114 covers an unsteady signal. Air temperature changes slowly, so rapid jumps point to the wiring rather than the air. Ford counts short excursions out of range that are each too brief for P0112/P0113 and sets the code after ten of them in one drive cycle. GM evaluates noise within the valid range: if the readings taken every 100 ms add up to more than 80 °C of movement within one second, in four of five seconds, the sample counts as failed. GM needs two trips. Typical culprit is a loose contact that opens with engine movement.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine light on
• Usually no noticeable symptoms
• Occasional brief stumble or rough idle possible

Common causes

• High Loose contact at the connector (corrosion, weak terminal tension)
• High Partly broken wire that opens with engine movement
• Medium Sensor with internal contact problem
• Low Electrical interference or ground fault

Likelihood is a general estimate across vehicles; your make and model may differ.