OBD Guide

B011C

Fluid Reservoir Level Sensor A

B011C is an OBD-II diagnostic trouble code meaning: Fluid Reservoir Level Sensor A. Common causes: low fluid level in reservoir, level sensor fault. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • SRS/Airbag light is on
  • Security error message on dashboard
  • Malfunction of the active hood (if there is one)

Causes

  • Low fluid level in reservoir
  • Level sensor fault
  • Damage to the wiring harness to the sensor
  • Short circuit in the sensor circuit
  • Problems with the SRS control unit

How to Fix

  1. Check the fluid level in the reservoir (if it is topped up)
  2. Check the integrity of the level sensor
  3. Use a diagnostic scanner to check sensor parameters
  4. Check wiring harness and connectors for damage
  5. If necessary, replace the sensor or add fluid

Related codes

Error B011C by Vehicle Brand

FAQ

What does the B011C code mean?

B011C is an OBD-II diagnostic trouble code that indicates: Fluid Reservoir Level Sensor A

What causes a B011C error code?

The most common causes of B011C include: Low fluid level in reservoir; Level sensor fault; Damage to the wiring harness to the sensor; Short circuit in the sensor circuit.

How do I fix a B011C diagnostic trouble code?

To fix B011C: Check the fluid level in the reservoir (if it is topped up). Check the integrity of the level sensor. Use a diagnostic scanner to check sensor parameters. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B011C?

Do not drive — repair immediately

How much does it cost to fix B011C?

The estimated repair cost for B011C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat