Code Definition

P00AD — Intake Air Temperature Sensor Signal High - Bank 2 - Sensor 1

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

About P00AD

P00AD 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 P00AD 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 P00AD 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 P00AD fault code is set when the Engine Control Module (ECM) detects a higher than expected voltage or signal from the first Intake Air Temperature (IAT) sensor in Bank 2. This sensor measures the temperature of the air entering the engine's intake system and is crucial for the ECM to accurately assess air density. This information is vital for optimising the air-fuel mixture, ignition timing, and other engine management decisions. In engines with multiple cylinder banks, such as V6 or V8 engines, Bank 2 refers to the second group of cylinders. A high signal from the IAT sensor can indicat...

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