Powertrain, generic · Fuel and air metering

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

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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.

Likely causes

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

Symptoms

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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–250
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

intake air temperature sensorintake air temperature sensor wiringmass air flow sensor

Related codes

P0111P0112P0113P0110P0099

References: law.cornell.edu, newtonnet.co.uk, fordservicecontent.com, gsi.ext.gm.com.