Code Definition

P001B — Intake Camshaft Profile Circuit Low - Bank 1 - Camshaft A

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

About P001B

P001B 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 P001B is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine.

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 P001B 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

P001B sets when the Engine Control Module (ECM) detects a low voltage condition on the control circuit for the intake Camshaft Profile Control actuator on Bank 1, Camshaft A, which the ECM interprets as a short to ground on the control wire or internal to the solenoid. Cam profile control, which is distinct from cam phasing or VVT, is a system that switches the intake valve lift between discrete profiles (low lift for efficiency and high lift for power) using an electrohydraulic or electromechanical actuator, with examples including Toyota VVTL i, Honda VTEC, Mercedes Camtronic, and Audi AVS. ...

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