Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0595 OBD-II Trouble Code: Cruise Control Servo Control Circuit Low

P0595 OBD-II Trouble Code: Cruise Control Servo Control Circuit Low

check engine light

P0595 trouble code definition

A P0595 trouble code is related to a vehicle’s cruise control servo that helps a vehicle maintain speed automatically. If the engine control unit detects voltage or resistance from the cruise control system, it will test the entire system - determining the cruise control servo control circuit is low on voltage to trigger a P0595.

What the P0595 code means

P0595 is an OBD-II generic code for a low voltage problem with the cruise control servo control circuit in that the signal being sent to the engine computer is not within the manufacturer’s parameters.

What causes the P0595 code?

A P0595 code can have more than one cause, but the most common are:

  • Faulty cruise control servo solenoid
  • Faulty cruise control switch
  • Faulty cruise control servo
  • Faulty cruise control circuit wiring
  • Faulty cruise control connectors
  • Faulty fuse

What are the symptoms of the P0595 code?

A P0595 will usually cause the cruise control to work poorly, or not at all. Some vehicles will also illuminate a cruise control light with the Check Engine Light.

How does a mechanic diagnose the P0595 code?

Your mechanic will first clear the code to see if it returns immediately. If it does, a visual inspection of the cruise control system will be next, paying close attention to the servo itself. If wiring or connectors appear damaged, they will need to be replaced. All vacuum lines to the cruise control servo will need to be inspected and repaired as well. The cruise control fuse will also need to be inspected for damage. If the problem continues, the cruise control switch and servo solenoid will need to be tested for continuity before being replaced. In some cases, the servo itself will not work and will need to be replaced.

Common mistakes when diagnosing the P0595 code

Hastily replaced components can result in unchanged results, so it’s important to test components before parts are replaced.

How serious is the P0595 code?

Because the worst that can result from a P0595 is the cruise control not working, the code isn’t very serious and your vehicle can be safely driven until repaired.

What repairs can fix the P0595 code?

The most common repairs for a P0595 are as follows:

  • Replaced cruise control servo solenoid
  • Replaced cruise control switch
  • Repaired cruise control circuit wiring
  • Replaced cruise control fuses

Additional comments for consideration regarding the P0595 code

Some vehicles have different styles of cruise control servos and it depends on whether or not your vehicle is drive-by-wire. These are controlled by the same actuator that opens and closes the throttle.

Need help with a P0595 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...

Related questions

Q: Loss of engine power when driving over 50 mph

Check for problem codes, even if the Check Engine Light is not illuminated right now. There are likely transient codes still set. This may be something simple like a fuel supply issue (fuel filter clogged, fuel pump relay contacts burned,...

Q: Check Engine Light does not come on even though there are trouble codes present

The pink/light green wire in ECM pin 2 on the connector will ground the wire internally to the ECM to turn on the Check Engine Light. You could test the wire with the key on and it should have battery...

Q: Code P0011

Trouble code P0011 points to an issue in the engines variable valve timing system. The solenoid responsible for altering the valve adjustment may have become dirty or failed and is stuck in a position better suited for a warm engine....