OBD Guide
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C0509

Right Front Wheel Speed Sensor A Circuit High

C0509 is an OBD-II diagnostic trouble code meaning: Right Front Wheel Speed Sensor A Circuit High. Common causes: malfunction of the right front wheel speed sensor, open or short circuit in wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS/ESP indicator is on
  • Unstable operation of the ABS system
  • Disabling cruise control
  • Incorrect speedometer readings

Causes

  • Malfunction of the right front wheel speed sensor
  • Open or short circuit in wiring harness
  • Damage to the sensor connector
  • Problems with the ABS/ESP control unit
  • Mechanical damage (for example, damage to the ring gear)

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Inspect the sensor connectors for corrosion or damage.
  3. Check the resistance of the wheel speed sensor (compare with reference values)
  4. Check for metal shavings on the sensor (may indicate damage to the ring gear)
  5. If necessary, replace the wheel speed sensor or wiring harness.
  6. Reset the error and check if it returns

Related codes

C0508C0510C0500

Error C0509 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0509 code mean?

C0509 is an OBD-II diagnostic trouble code that indicates: Right Front Wheel Speed Sensor A Circuit High

What causes a C0509 error code?

The most common causes of C0509 include: Malfunction of the right front wheel speed sensor; Open or short circuit in wiring harness; Damage to the sensor connector; Problems with the ABS/ESP control unit.

How do I fix a C0509 diagnostic trouble code?

To fix C0509: Check the integrity of the sensor wiring harness. Inspect the sensor connectors for corrosion or damage.. Check the resistance of the wheel speed sensor (compare with reference values). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0509?

Limited driving only, diagnose soon

How much does it cost to fix C0509?

The estimated repair cost for C0509 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat