OBD Guide
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P0112

Intake Air Temperature Sensor 1 Circuit Low Bank 1

P0112 is an OBD-II diagnostic trouble code meaning: Intake Air Temperature Sensor 1 Circuit Low Bank 1. Common causes: faulty intake air temperature sensor, sensor wiring short circuit to ground. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Unstable idle speed
  • Difficulty starting the engine
  • Increased fuel consumption
  • Reduced engine power
  • Black smoke from the exhaust pipe
  • Check Engine Light Is On

Causes

  • Faulty intake air temperature sensor
  • Sensor wiring short circuit to ground
  • Open circuit in the sensor power supply
  • Poor contact in the sensor connector
  • Connector pin corrosion
  • ECU malfunction (rare)

How to Fix

  1. Connect the diagnostic scanner and read the error codes
  2. Check the voltage at the IAT sensor with a multimeter
  3. Visually inspect the sensor and its wiring for damage
  4. Check sensor resistance at different temperatures
  5. Check the integrity of the wiring from the sensor to the ECU
  6. Clean the connector contacts and check the connection is secure.
  7. If necessary, replace the intake air temperature sensor
  8. Clear error codes and test drive

Related codes

P0113P0110P0111P0114

Error P0112 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0112 code mean?

P0112 is an OBD-II diagnostic trouble code that indicates: Intake Air Temperature Sensor 1 Circuit Low Bank 1

What causes a P0112 error code?

The most common causes of P0112 include: Faulty intake air temperature sensor; Sensor wiring short circuit to ground; Open circuit in the sensor power supply; Poor contact in the sensor connector.

How do I fix a P0112 diagnostic trouble code?

To fix P0112: Connect the diagnostic scanner and read the error codes. Check the voltage at the IAT sensor with a multimeter. Visually inspect the sensor and its wiring for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0112?

Limited driving only, diagnose soon

How much does it cost to fix P0112?

The estimated repair cost for P0112 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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