Fault Family System: Powertrain (P-Codes) 10 SAE Codes

Cruise Control Servo Actuator Circuit

Diagnostic & Technical Explanation

Code P0525 (Cruise Control Servo Control Circuit Range/Performance) sets when the ECM detects an open circuit or out-of-range voltage while driving the cruise control servo (electronic throttle interface) or, on older vacuum-actuated systems, the vacuum/vent solenoids that move the throttle cable. Causes are a failed servo motor or vacuum solenoid, a leaking vacuum diaphragm/hose, or damaged control wiring to the actuator.

These 10 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 10 times.

Codes in this family (10)

Code	Definition	Repair coverage
P0525	Cruise Control Servo Control Circuit Range/Performance	3 ranked fixes
P0582	Cruise Control Vacuum Control Circuit/Open	3 ranked fixes
P0583	Cruise Control Vacuum Control Circuit Low	3 ranked fixes
P0584	Cruise Control Vacuum Control Circuit High	3 ranked fixes
P0586	Cruise Control Vent Control Circuit/Open	3 ranked fixes
P0587	Cruise Control Vent Control Circuit Low	3 ranked fixes
P0588	Cruise Control Vent Control Circuit High	3 ranked fixes
P0594	Cruise Control Servo Control Circuit/Open	3 ranked fixes
P0595	Cruise Control Servo Control Circuit Low	3 ranked fixes
P0596	Cruise Control Servo Control Circuit High	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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