OBD Guide
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P0596

Cruise Control Servo Control Circuit High

P0596 is an OBD-II diagnostic trouble code meaning: Cruise Control Servo Control Circuit High. Common causes: short circuit to power in the cruise control servo circuit, damaged or broken wiring between the ecu and the servo drive. Estimated repair cost: $33–133.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–133 (est.)

Symptoms

  • Cruise control does not work or does not work correctly
  • Check Engine light is on
  • Cannot activate or hold set speed
  • Spontaneous disabling of cruise control while driving
  • In some cases, unstable engine operation

Causes

  • Short circuit to power in the cruise control servo circuit
  • Damaged or broken wiring between the ECU and the servo drive
  • Faulty cruise control servo
  • Poor contact in the servo or ECU connector
  • ECU malfunction (rare)

How to Fix

  1. Read all error codes and check for associated cruise control codes
  2. Inspect the cruise control servo wiring and connectors for damage, oxidation, or short circuits.
  3. Measure the voltage in the servo control circuit with the ignition on - must meet specification
  4. Check the resistance of the servo drive circuit and compare with the reference values
  5. If necessary, replace the cruise control servomotor
  6. After repair, reset error codes and check system operation

Related codes

P0550P0551P0594P0595P0597

Error P0596 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0596 code mean?

P0596 is an OBD-II diagnostic trouble code that indicates: Cruise Control Servo Control Circuit High

What causes a P0596 error code?

The most common causes of P0596 include: Short circuit to power in the cruise control servo circuit; Damaged or broken wiring between the ECU and the servo drive; Faulty cruise control servo; Poor contact in the servo or ECU connector.

How do I fix a P0596 diagnostic trouble code?

To fix P0596: Read all error codes and check for associated cruise control codes. Inspect the cruise control servo wiring and connectors for damage, oxidation, or short circuits.. Measure the voltage in the servo control circuit with the ignition on - must meet specification. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0596?

Do not drive — repair immediately

How much does it cost to fix P0596?

The estimated repair cost for P0596 is $33–133. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat