P0113 Toyota Tundra
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 Toyota Tundra 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 Toyota Tundra.
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 Toyota Tundra.
Common Causes on Toyota Tundra
- Intake air temperature (IAT) sensor circuit open — sensor built into Denso MAF on most Toyota models
- Broken wire in IAT/MAF harness connector
- Corroded IAT sensor connector pins
- Failed IAT element inside the MAF housing
Symptoms
- Check Engine Light on
- Engine may run slightly rich on cold starts
- No noticeable driveability issues in most cases
- Fuel trim may be slightly off
Notes for Toyota Tundra
On most Toyota models the IAT sensor is integrated into the MAF housing — you cannot replace just the IAT, the whole MAF assembly must be swapped.