OBD Guide
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C0237

Erratic Rear Speed Signal

C0237 is an OBD-II diagnostic trouble code meaning: Erratic Rear Speed Signal . Common causes: damage or contamination of the drive ring (impulse rotor), wheel bearing play causing clearance change. Estimated repair cost: $17–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–111 (est.)

Symptoms

  • ABS lamp flashes intermittently
  • Jerking or abnormal operation of ABS when braking
  • Unstable speedometer readings
  • Disabling ESP and traction control
  • Incorrect operation of cruise control

Causes

  • Damage or contamination of the drive ring (impulse rotor)
  • Wheel bearing play causing clearance change
  • Partial damage to the sensor wiring (frayed insulation)
  • Oxidation of contacts in the sensor connector
  • Loose speed sensor
  • Metal shavings sticking to the sensor

How to Fix

  1. Read errors and check speed sensor data in real time with a scanner
  2. Compare the rear sensor readings with others while driving
  3. Inspect the drive ring for damage, dirt, and adhering chips.
  4. Check wheel bearing play
  5. Inspect the sensor wiring along its entire length, especially in kinks.
  6. Clean or replace the setting ring, replace the sensor if necessary

Related codes

C0020C0030C0040

Error C0237 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0237 code mean?

C0237 is an OBD-II diagnostic trouble code that indicates: Erratic Rear Speed Signal

What causes a C0237 error code?

The most common causes of C0237 include: Damage or contamination of the drive ring (impulse rotor); Wheel bearing play causing clearance change; Partial damage to the sensor wiring (frayed insulation); Oxidation of contacts in the sensor connector.

How do I fix a C0237 diagnostic trouble code?

To fix C0237: Read errors and check speed sensor data in real time with a scanner. Compare the rear sensor readings with others while driving. Inspect the drive ring for damage, dirt, and adhering chips.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0237?

Limited driving only, diagnose soon

How much does it cost to fix C0237?

The estimated repair cost for C0237 is $17–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat