Engine-Codes - Toyota - P0112 2009 TOYOTA PRIUS

P0112 2009 TOYOTA PRIUS - Intake Air Temperature Circuit Low Input

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P0112 2009 TOYOTA PRIUS Possible Causes

  • Faulty Intake Air Temperature (IAT) sensor
  • Dirty air filter
  • Intake Air Temperature (IAT) sensor harness is open or shorted
  • Intake Air Temperature (IAT) sensor circuit poor electrical connection

How is the P0112 2009 TOYOTA PRIUS code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

Intake air temperature sensor is built into the mass air flow meter. Before doing anything else clean the mass air flow meter with mass air flow sensor cleaner and reset the light.

What is the cost to diagnose the P0112 2009 TOYOTA PRIUS code

Labor: 1.0

The cost to diagnose the P0112 2009 TOYOTA PRIUS code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?

An excessively low voltage from the sensor is sent to ECM.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0112 2009 TOYOTA PRIUS Meaning

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

More Information

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