P0112

Low Severity

Intake Air Temperature Sensor Circuit Low

Fuel System

What Does P0112 Mean?

IAT sensor voltage is too low, indicating impossibly high air temperature. Usually a short circuit in the sensor or wiring.

Common Fix

Replace IAT sensor

Estimated Cost (DIY)

$10 - $30

Symptoms

  • ⚠️Check engine light
  • ⚠️Slightly rich running
  • ⚠️Decreased fuel economy

Related Symptoms

Check engine light on

Common Causes

Shorted IAT sensorlikely
Short in wiringpossible
Corroded connectorpossible

How to Diagnose P0112

  1. 1Disconnect sensor — if code changes to P0113, sensor is bad
  2. 2Check wiring for shorts to ground
  3. 3Measure sensor resistance
  4. 4Replace sensor

OEM Diagnostic Flowchart

Scroll to load technician if/then branches.

Read live data and freeze frame for P0112 to pinpoint the cause before buying parts.

Recommended
TOPDON TopScan

TopScan

$51.27

DIYers who want phone-based scanning

View on TOPDON
TOPDON ArtiLink600

ArtiLink600

$99

DIYers working on ABS/airbag systems

View on TOPDON

Related Resources

Repair guides, symptom pages, and wiring diagrams related to P0112.

OEM Manual Evidence

Browse →
2013 GMC Truck Yukon XL Denali AWD V8-6.2L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...

2013 GMC Truck Yukon XL Denali 2WD V8-6.2L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...

2013 GMC Truck Yukon XL 4WD V8-6.0L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...

2013 GMC Truck Yukon XL 4WD V8-5.3L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...

Related Symptoms

Browse →
Check engine light onSymptom Hub

A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.

Exact Vehicle Hubs

Browse →
2013 Gmc Truck Yukon Xl 4wd V8 5.3l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0112.

2013 Gmc Truck Yukon Xl 4wd V8 6.0l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0112.

2013 Gmc Truck Yukon Xl Denali 2wd V8 6.2l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0112.

2013 Gmc Truck Yukon Xl Denali Awd V8 6.2l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0112.

Related Codes

P0110: Intake Air Temperature Sensor CircuitRelated

The IAT sensor circuit has a fault. This sensor measures incoming air temperature for fuel calculations.

P0113: Intake Air Temperature Sensor Circuit HighRelated

IAT sensor voltage is above maximum range, reading as extremely cold air. Usually an open circuit.

Frequently Asked Questions

What does low IAT reading mean?
Low voltage means the ECM thinks the air is very hot, so it trims fuel delivery. Usually a sensor fault.
How to test IAT sensor?
Measure resistance — should be ~2-3K ohms at 70°F. Much lower indicates a short.

Need a diagnosis for your specific vehicle?

Start Free AI Diagnosis →

100% Free — No signup required