P0113 Ford Ranger
Intake Air Temperature Sensor 1 Circuit High · Powertrain Code · Low · Repair: Easy
What is P0113?
The IAT sensor is reading above its expected range — possible open circuit.
When the Ford Ranger triggers code P0113 (intake air temperature sensor 1 circuit high), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Ford Ranger.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Ford Ranger.
Common Causes on Ford Ranger
- Open circuit in the IAT sensor wiring — corroded connector pins
- Failed IAT sensor (often integrated into the MAF sensor housing on Ford)
- Disconnected IAT/MAF sensor connector
- Rodent or abrasion damage to wiring harness near air filter box
Symptoms
- Check engine light
- Slightly rough cold start
- Engine may default to a fixed IAT value affecting fuel trim
- Minor fuel economy decrease
Notes for Ford Ranger
On most modern Fords, the IAT sensor is built into the MAF sensor housing — replacing the MAF sensor fixes IAT issues as well.