Code Definition

P00A8 — Intake Air Temperature Sensor Signal High - Bank 2 - Sensor 2

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

About P00A8

P00A8 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 P00A8 is stored, the module has detected a signal or supply voltage higher than the expected operating range; a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; 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 P00A8 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 P00A8 fault code is set when the Engine Control Module (ECM) detects a higher than expected voltage or signal from the second Intake Air Temperature (IAT) sensor in Bank 2. This sensor is responsible for measuring the temperature of the air entering the engine's intake system. Accurate temperature readings from the IAT sensor are essential for the ECM to properly determine the air density, which is crucial for optimising the air-fuel mixture, ignition timing, and other aspects of engine management. In engines with multiple banks, such as V6 or V8 engines, Bank 2 refers to the second group ...

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