Code Definition

P0011 — Camshaft Position A - Timing Over-Advanced or System Performance Bank 1

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

About P0011

P0011 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Toyota vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0011 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; 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 P0011 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 P0011 code is set when the Engine Control Module (ECM) detects that the intake camshaft on Bank 1 is more advanced than the commanded target position, or that the Variable Valve Timing (VVT) phaser response falls outside the learned performance window. The ECM monitors actual camshaft timing using the Bank 1 camshaft position sensor and compares it against the crankshaft reference signal, calculating cam advance in degrees against a target map stored in memory. Cam timing is controlled by an oil fed phaser assembly on the intake cam, actuated by an Oil Control Valve (OCV) that the ECM puls...

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