OBD Guide

P0595

Cruise Control Servo Control Circuit Low

P0595 is an OBD-II diagnostic trouble code meaning: Cruise Control Servo Control Circuit Low. Common causes: servo control circuit short to ground, closing two wires of the servo circuit together. Estimated repair cost: $22–167.

Severity
Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–167 (est.)

Symptoms

  • Cruise control doesn't work at all
  • Check Engine Light Illuminates
  • Lack of servo response to control commands
  • Possible ECU fault code (internal output error)

Causes

  • Servo control circuit short to ground
  • Closing two wires of the servo circuit together
  • Internal short circuit in the actuator winding to the housing
  • Damage to wire insulation (friction against sharp edges of the body)
  • ECU output stage malfunction

How to Fix

  1. Disconnect the servo connector and check if the code disappears (to isolate the fault)
  2. Measure the resistance between the servo drive control terminals and ground (should not be close to zero)
  3. Test the control circuit wires from the ECU to the servo drive for a short to ground.
  4. Inspect the wiring for signs of insulation chafing
  5. If the wiring is correct, replace the servo drive
  6. If the servo drive is working properly, diagnose the ECU output stage

Related codes

Error P0595 by Vehicle Brand

FAQ

What does the P0595 code mean?

P0595 is an OBD-II diagnostic trouble code that indicates: Cruise Control Servo Control Circuit Low

What causes a P0595 error code?

The most common causes of P0595 include: Servo control circuit short to ground; Closing two wires of the servo circuit together; Internal short circuit in the actuator winding to the housing; Damage to wire insulation (friction against sharp edges of the body).

How do I fix a P0595 diagnostic trouble code?

To fix P0595: Disconnect the servo connector and check if the code disappears (to isolate the fault). Measure the resistance between the servo drive control terminals and ground (should not be close to zero). Test the control circuit wires from the ECU to the servo drive for a short to ground.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0595?

Do not drive — repair immediately

How much does it cost to fix P0595?

The estimated repair cost for P0595 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat