OBD Guide
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C0191

Longitudinal Accelerometer Signal Voltage

C0191 is an OBD-II diagnostic trouble code meaning: Longitudinal Accelerometer Signal Voltage. Common causes: open or short circuit in the sensor wiring harness, accelerometer malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • The SRS system may not work in an accident.

Causes

  • Open or short circuit in the sensor wiring harness
  • Accelerometer malfunction
  • Problems with the SRS control unit
  • Contact corrosion

How to Fix

  1. Check the wiring harness for opens and shorts
  2. Test the accelerometer using a scanner
  3. Replace the accelerometer if necessary
  4. Check the SRS control unit

Related codes

B0001B0002C0190

Error C0191 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0191 code mean?

C0191 is an OBD-II diagnostic trouble code that indicates: Longitudinal Accelerometer Signal Voltage

What causes a C0191 error code?

The most common causes of C0191 include: Open or short circuit in the sensor wiring harness; Accelerometer malfunction; Problems with the SRS control unit; Contact corrosion.

How do I fix a C0191 diagnostic trouble code?

To fix C0191: Check the wiring harness for opens and shorts. Test the accelerometer using a scanner. Replace the accelerometer if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0191?

Limited driving only, diagnose soon

How much does it cost to fix C0191?

The estimated repair cost for C0191 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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