P0113 on Toyota Corolla E170: Intake Air Temperature Sensor 1 Circuit High Input

Short answer: P0113 means “Intake Air Temperature Sensor 1 Circuit High Input”. The car’s computer has found a fault in the Engine system and turns on the Check engine light (MIL). First check: read the code and freeze-frame data with an OBD-II scanner.

Standard OBD-II code Same meaning on all cars (SAE J2012). Not checked against this car’s factory manual.

Code

P0113

System

Engine

Dashboard light

Check engine light (MIL)

Applies to

Generic OBD-II meaning. Not every code is used by this car.

Confidence

medium (generic OBD-II definition, not checked against the factory manual for this car)

Source

obd-codes.com

Symptoms and when it is set

1. Check engine light on

Likely causes

1. Internally failed IAT sensor
2. Faulty connection at IAT sensor
3. Open in IAT ground circuit or signal circuit
4. Short to voltage in IAT signal circuit or reference circuit
5. IAT harness and/or wiring routed too close to high-voltage wiring (e.g
6. Alternator, spark plug cables, etc.)
7. Faulty PCM (less likely but not impossible)

What to check, in order

1. Read the code and freeze-frame data with an OBD-II scanner
2. Check the connector and wiring of the part named in the code
3. Test the part with scanner live data or a multimeter, using the values in the repair manual
4. Fix the cause, clear the code and test-drive

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0113 · Toyota Passo (1st gen)
• P0113 · Toyota Corolla (10th gen, E140)
• P0113 · Honda City (5th gen, GM2)
• P0113 · Honda Civic (10th gen, FC)
• P0113 · Suzuki Wagon R (Pakistan, K10B)
• P0113 on all cars compared

← P0112 P0115 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.