Code Definition

P00A1 — Intercooler Temperature Sensor Circuit Signal Out of Range - Bank 2

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

About P00A1

P00A1 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 P00A1 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; 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 P00A1 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

Intercooler temperature signal indicating approximately -40'C open circuit or approximately 140'C short circuit.
The P00A1 fault code is set when the Engine Control Module (ECM) detects that the signal from the Charge Air Cooler (CAC) temperature sensor, also known as the intercooler temperature sensor, in Bank 2 is out of the expected range or is performing abnormally. This sensor is critical in turbocharged or supercharged engines, as it measures the temperature of the air after cooling by the intercooler. The intercooler reduces the temperature of the compressed air from the turbocharger ...

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