Code Definition

P064B — PTO control module circuit malfunction

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

About P064B

P064B 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 P064B is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P064B 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 fault code P064B is set when the Engine Control Module (ECM) detects a malfunction within the circuitry of the Power Take-Off (PTO) Control Module. This diagnostic trouble code suggests an electrical issue in the circuit responsible for controlling the PTO, which could be due to wiring problems, a faulty PTO Control Module, or an issue in the ECM's ability to communicate with or control the PTO system.

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