OBD Guide

B011E

Fluid Reservoir Level Sensor C

B011E is an OBD-II diagnostic trouble code meaning: Fluid Reservoir Level Sensor C. Common causes: liquid level sensor malfunction, liquid leak from reservoir. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • Passive safety system memory error
  • Inability to activate pretensioners during diagnostics

Causes

  • Liquid level sensor malfunction
  • Liquid leak from reservoir
  • Open or short circuit in wiring harness
  • Poor contact in the sensor connector
  • Low fluid level in reservoir

How to Fix

  1. Check fluid level in circuit C reservoir
  2. Visually inspect the tank and sensor for leaks
  3. Check the integrity of the wiring harness and the condition of the contacts
  4. Test sensor resistance (compare with specifications)
  5. If necessary, replace the sensor or add fluid

Related codes

Error B011E by Vehicle Brand

FAQ

What does the B011E code mean?

B011E is an OBD-II diagnostic trouble code that indicates: Fluid Reservoir Level Sensor C

What causes a B011E error code?

The most common causes of B011E include: Liquid level sensor malfunction; Liquid leak from reservoir; Open or short circuit in wiring harness; Poor contact in the sensor connector.

How do I fix a B011E diagnostic trouble code?

To fix B011E: Check fluid level in circuit C reservoir. Visually inspect the tank and sensor for leaks. Check the integrity of the wiring harness and the condition of the contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B011E?

Do not drive — repair immediately

How much does it cost to fix B011E?

The estimated repair cost for B011E is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat