Powertrain, generic · Fuel and air metering

P0110 Intake Air Temperature Sensor 1 Circuit Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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. P0110 is the general circuit fault. With a conventional analogue sensor most manufacturers report low and high signals separately (P0112/P0113), so P0110 mainly appears in two cases: with digital (SENT) sensors that combine air mass and temperature, where it stands for lost communication or an implausible status (Ford diesel 2023, after about 5 s), and in some Bosch systems as a collective code whose fault type byte tells open circuit from short to ground. The control module then uses a substitute temperature; some systems also limit torque.

Likely causes

Connector or wiring to the sensor open or corroded
Sensor or mass air flow sensor with built-in temperature sensor faulty
Sensor supply or ground disturbed
Engine control module faulty

Symptoms

  • Check engine light on
  • Reduced power or torque limitation on some systems
  • Otherwise usually inconspicuous; cold start may be slightly worse

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–300
Time0.3–1.5 h

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

What to check first

  1. Compare IAT with ambient temperature on a cold engine
  2. Inspect wiring

Parts involved

intake air temperature sensorintake air temperature sensor wiringmass air flow sensor

Related codes

P0111P0112P0113P0114P0100P0095

References: law.cornell.edu, fordservicecontent.com, saabwisonline.com.