OBD Guide
ENFRDEESPT

B14FB

Low Side Driver 4

B14FB is an OBD-II diagnostic trouble code meaning: Low Side Driver 4. Common causes: open or short circuit in the circuit, low voltage driver fault. Estimated repair cost: $56–167.

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

Symptoms

  • Inoperative system components
  • Unstable engine operation
  • Check engine light comes on

Causes

  • Open or short circuit in the circuit
  • Low voltage driver fault
  • Wiring harness damage
  • Corrosion of connectors

How to Fix

  1. Check the integrity of the circuit and connectors
  2. Test low voltage driver
  3. Replace damaged components
  4. Clean contacts from corrosion

Related codes

B14FAB14FCB14FD

FAQ

What does the B14FB code mean?

B14FB is an OBD-II diagnostic trouble code that indicates: Low Side Driver 4

What causes a B14FB error code?

The most common causes of B14FB include: Open or short circuit in the circuit; Low voltage driver fault; Wiring harness damage; Corrosion of connectors.

How do I fix a B14FB diagnostic trouble code?

To fix B14FB: Check the integrity of the circuit and connectors. Test low voltage driver. Replace damaged components. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B14FB?

Limited driving only, diagnose soon

How much does it cost to fix B14FB?

The estimated repair cost for B14FB is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat