Code Definition

P1693 — Oil Control Valve Closing Malfunction

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Toyota

About P1693

P1693 is a manufacturer-specific 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.

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.

P1693 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This code relates to the mechanical and hydraulic operation of the Variable Valve Timing system on Toyota engines. The Oil Control Valve (OCV) controls oil flow to the camshaft timing actuator, and when deactivated it should allow the actuator to return to its base or default timing position. The Engine Control Module (ECM) confirms this using the camshaft position sensor. DTC P1693 sets when the ECM deactivates the OCV but the camshaft timing does not return to base as expected, indicating the valve is stuck open or sluggish to close, or the actuator is failing to return. This is a mechanical...

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