P0112 - Intake Air Temperature Circuit Low Input

IAT signal indicates very cold temperature (low voltage).

Treat the code as the starting point: compare symptoms, likely causes, and repair paths before pricing parts or moving into an estimate.

Code Overview

IAT signal indicates very cold temperature (low voltage).

Common Causes

• Short to ground
• IAT sensor failed

Diagnostic Steps

1. Inspect wiring for chafing
2. Check sensor resistance vs temp spec
3. Verify reference voltage

Likely Repairs & Cost Guides

Use symptoms, scan data, and quick checks to confirm the likely repair path before pricing parts. The estimator helps compare repair paths before replacing anything unnecessarily.

Related OBD Codes

Browse nearby code-family pages when the same fault pattern overlaps across systems, such as misfire, lean fuel trim, EVAP sealing, cooling, or charging faults.

Next Steps

Move from code lookup to diagnosis, then estimate the likely repair only after symptoms, causes, and checks point to the same path.