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2005 RAM 1500
5.7L V8•4WD•gas•HEMI
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Repairs0Labor517Torque141Fluid11DTC1809Battery1Maintenance0Recalls0
P1192moderate severityPowertrain

Inlet Air Temperature Sensor Circuit Low

on 2005 Ram 1500 5.7L V8 · 4WD

What this code means

The IAT sensor signal voltage is reading too low, often indicating a short to ground. Related to generic P0112 for low intake air temp.

Symptoms

  • Check engine light on
  • Hard starting
  • Poor idle quality

Common causes

  • Shorted IAT sensor
  • Wiring shorted to ground
  • Corroded connector
  • Faulty PCM

Diagnostic steps

  1. Scan for stored codes
  2. Inspect IAT wiring for short to ground
  3. Measure sensor signal voltage
  4. Test sensor resistance at known temp
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