Code Definition

P00AA — Intake Air Temperature Sensor Signal Error - Bank 2 - Sensor 1

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

About P00AA

P00AA 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 P00AA is stored, the module has detected 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 P00AA 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 P00AA fault code is set when the Engine Control Module (ECM) detects an error in the signal from the first Intake Air Temperature (IAT) sensor in Bank 2 of the engine. This sensor measures the temperature of the air entering the engine's intake system and is crucial for the ECM to calculate air density. Accurate air density readings are essential for optimising the air-fuel mixture, ignition timing, and other engine management decisions. In engines with multiple banks, such as V6 or V8 engines, Bank 2 refers to the second group of cylinders. An error in the IAT sensor signal can lead to in...

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