Code Definition

P0595 — Cruise control servo circuit low

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

About P0595

P0595 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 P0595 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 P0595 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

This fault code indicates that the engine control module (ECM) or the body control module (BCM) has detected a lower than expected voltage in the cruise control servo circuit. The cruise control servo is an essential component in some cruise control systems, usually those with a mechanical linkage to the throttle. It operates based on electrical signals to control the vehicle's speed. A low voltage in the servo circuit suggests a potential short to ground or an issue in the electrical system that reduces the operating voltage, potentially leading to insufficient or erratic operation of the cru...

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