Code Definition

P001A — Intake Camshaft Profile Circuit Open - Bank 1 - Camshaft A

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

About P001A

P001A 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 P001A is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; 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 P001A 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

P001A sets when the Engine Control Module (ECM) detects an open circuit in the control output for the intake Camshaft Profile Control actuator on Bank 1, Camshaft A. Cam profile control, which is distinct from cam phasing or VVT, is a system that switches the intake valve lift profile between two or more discrete cam lobes or lift stages to optimise engine breathing across the operating range. Common examples include Toyota VVTL i, Honda VTEC, Mercedes Camtronic, and Audi AVS, where an electrohydraulic or electromechanical actuator selects between a low lift profile for efficiency and a high l...

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

Quick Facts