Code Definition

P0658 — Actuator power supply circuit low - Circuit A

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

About P0658

P0658 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 P0658 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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 P0658 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 P0658 is set when the Engine Control Module (ECM) detects a lower than expected voltage level in the actuator power supply circuit, designated as 'Circuit A.' This circuit is responsible for providing power to various actuators in the vehicle, such as solenoids, valves, and motor-driven components. A low voltage condition in this circuit suggests issues like a partial short to ground, excessive resistance, or problems within the ECM's power output capabilities. This insufficient voltage can impair the operation of the actuators, leading to reduced efficiency and performance issu...

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