Staff Answer
Jun 22, 2026 - 01:11 PM
-
The P0098 error code stands for "Intake Air Temperature (IAT) Sensor 2 Circuit High." This indicates that the Engine Control Module (ECM) is detecting an electrical signal from the IAT sensor that is outside of the expected high-voltage range, usually pointing to an open circuit or a sensor that has failed internally.
-
Inspect Wiring and Connector: Check the IAT sensor wiring harness for broken, frayed, or corroded wires. Inspect the sensor connector pins to ensure they are not bent or loose.
-
Check for Open Circuits: This code often indicates an "open" in the circuit. Use a multimeter to check for continuity in the signal and ground wires leading from the sensor back to the ECM.
-
Test/Replace IAT Sensor: If the wiring is intact, the sensor itself may have an internal open circuit. An IAT sensor typically changes resistance based on temperature; if it shows infinite resistance (or "OL" on a multimeter), the sensor is dead and must be replaced.
Note: The IAT sensor is usually located in the air intake ducting or intake manifold. Always ensure the ignition is off before disconnecting any sensors to avoid triggering additional fault codes in the computer. Clear the code with an OBDII scanner after performing the repair.
Watch My Tutorial
Add New Comment