OBD Guide
ENFRDEESPT

C009B

4WD/AWD Rear Differential Unit Actuator A Position Sensor C

C009B is an OBD-II diagnostic trouble code meaning: 4WD/AWD Rear Differential Unit Actuator A Position Sensor C. Common causes: malfunction of the differential drive position sensor, open or shorted sensor wiring harness. Estimated repair cost: $167–444.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–444 (est.)

Symptoms

  • The check engine or all-wheel drive light comes on
  • Disabling the all-wheel drive system
  • Incorrect power distribution between axles
  • Noticeable deterioration in handling on slippery surfaces

Causes

  • Malfunction of the differential drive position sensor
  • Open or shorted sensor wiring harness
  • Poor contact in the sensor connector
  • Mechanical failure of the differential drive
  • Problems with the four-wheel drive control unit

How to Fix

  1. Check the resistance of the position sensor and compare with the nominal values
  2. Check the integrity of the wiring harness and the quality of contacts in the connectors
  3. Scan the system for other related errors
  4. If necessary, replace the position sensor or differential drive
  5. After repair, carry out a test drive to check the operation of the system.

Related codes

C009AC009CC009DU0100

Error C009B by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C009B code mean?

C009B is an OBD-II diagnostic trouble code that indicates: 4WD/AWD Rear Differential Unit Actuator A Position Sensor C

What causes a C009B error code?

The most common causes of C009B include: Malfunction of the differential drive position sensor; Open or shorted sensor wiring harness; Poor contact in the sensor connector; Mechanical failure of the differential drive.

How do I fix a C009B diagnostic trouble code?

To fix C009B: Check the resistance of the position sensor and compare with the nominal values. Check the integrity of the wiring harness and the quality of contacts in the connectors. Scan the system for other related errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C009B?

Limited driving only, diagnose soon

How much does it cost to fix C009B?

The estimated repair cost for C009B is $167–444. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat