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P0111

Overview

Code

P0111

Code Type

P

Code Class

P0

System

Engine

Severity Level

Low

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0111 indicates that the intake air temperature (IAT) sensor signal is outside the expected range or performance limits

Symptoms

Check Engine Light illuminated; Poor engine performance; Reduced fuel economy

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Incorrect IAT data can affect air-fuel mixture calculations and engine efficiency

Possible Causes

Faulty IAT sensor; Wiring or connector problems; Sensor contamination

Diagnostic Steps

1 Scan and confirm the code; 2 Inspect wiring and connectors; 3 Monitor live IAT readings; 4 Compare readings to ambient conditions; 5 Replace the sensor if values are abnormal

Drive Safety Notes

Vehicle operation is usually unaffected, but diagnosis is recommended to restore efficiency

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