Code Definition

P00A3 — Intercooler Temperature Sensor Signal High - Bank 2

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

About P00A3

P00A3 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 P00A3 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 P00A3 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 P00A3 fault code is set when the Engine Control Module (ECM) detects a higher than expected voltage or signal from the Charge Air Cooler (CAC) temperature sensor, also known as the intercooler temperature sensor, in Bank 2. This sensor monitors the temperature of the air after it has been cooled by the intercooler in vehicles equipped with turbocharged or supercharged engines. The role of the intercooler is to reduce the temperature of the compressed air from the turbocharger or supercharger before it enters the engine, which increases air density and improves combustion efficiency. A high...

Join TaT to view the complete code information and diagnostic details.

Quick Facts