Code Definition

P0098 — Intake Air Temperature Sensor 2 Circuit High

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0098

P0098 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0098 is stored, the module has detected a signal or supply voltage higher than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0098 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0098 code indicates a high input condition in the circuit of the Intake Air Temperature (IAT) Sensor 2. This sensor is responsible for measuring the temperature of the air entering the engine's intake system. The Engine Control Module (ECM) relies on this information to adjust fuel injection and ignition timing for optimal engine performance. The ECM sets this code when it detects that the voltage from the IAT Sensor 2 is higher than expected, which may indicate a malfunction in the sensor or its circuit.

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