AutoCodeFix
🔍
Accident Estimate
EngineMinor✅ DIY Friendly

P0112

Intake Air Temperature Circuit Low Input

IAT sensor voltage is lower than expected — ECM thinks air is very cold.

SeverityMinor
CategoryEngine
Est. Repair Cost$20–$150
Code TypePowertrain
DIY RepairYes

⚡ Common Causes

  • ›Short to ground in IAT circuit
  • ›Faulty sensor
  • ›Connector corrosion
  • ›ECM issue

⚠️ Symptoms

  • ›Rich running condition
  • ›Poor fuel economy
  • ›Black smoke
  • ›Check engine light

✅ How to Fix — Step by Step

  • Step 1:Check sensor connector for corrosion
  • Step 2:Test sensor resistance
  • Step 3:Replace IAT sensor
  • Step 4:Check wiring for short

🔧 Diagnostic Tools Required

Using the correct diagnostic tools helps identify the root cause of P0112 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: Low IAT voltage causes rich fueling — watch for increased fuel consumption.

Repair Cost Estimate

Full Repair Estimate
$20–$150
DIY Possible?
YES
Severity
Minor

Frequently Asked Questions

What does OBD2 code P0112 mean?+
P0112 stands for Intake Air Temperature Circuit Low Input. IAT sensor voltage is lower than expected — ECM thinks air is very cold.
What causes code P0112?+
Short to ground in IAT circuit; Faulty sensor; Connector corrosion; ECM issue
How do I fix code P0112?+
Check sensor connector for corrosion; Test sensor resistance; Replace IAT sensor; Check wiring for short
How much does it cost to fix P0112?+
Estimated repair cost for P0112 is $20–$150.
Is P0112 DIY-friendly?+
Yes — P0112 is generally DIY-friendly with basic tools.

AI Diagnosis

🤖 AI-powered diagnosis for P0112 is coming soon.

Related Codes

P0300Random/Multiple Cylinder Misfire Detected
CriticalDIY
P0016Crankshaft/Camshaft Position Correlation Bank 1 Sensor A
Critical
P0301Cylinder 1 Misfire Detected
CriticalDIY
P0302Cylinder 2 Misfire Detected
CriticalDIY
P0303Cylinder 3 Misfire Detected
CriticalDIY
P0304Cylinder 4 Misfire Detected
CriticalDIY