OBD Guide
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B19FB

Right Rear Window Switch Circuit Low

B19FB is an OBD-II diagnostic trouble code meaning: Right Rear Window Switch Circuit Low. Common causes: broken or damaged switch wiring harness, oxidation of switch contacts. Estimated repair cost: $17–56.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Right rear window regulator does not work
  • Intermittent operation of the right rear window
  • Glass switch does not respond to pressure

Causes

  • Broken or damaged switch wiring harness
  • Oxidation of switch contacts
  • Glass switch malfunction
  • Short circuit in the circuit
  • Body Module (BCM) Problems

How to Fix

  1. Visual inspection of the wiring harness and switch contacts
  2. Checking the voltage in the switch circuit
  3. Replacing the switch if a fault is detected
  4. Repair or replacement of damaged wires
  5. Resetting the error and checking the system operation

Related codes

B19FAB19FCB19FD

FAQ

What does the B19FB code mean?

B19FB is an OBD-II diagnostic trouble code that indicates: Right Rear Window Switch Circuit Low

What causes a B19FB error code?

The most common causes of B19FB include: Broken or damaged switch wiring harness; Oxidation of switch contacts; Glass switch malfunction; Short circuit in the circuit.

How do I fix a B19FB diagnostic trouble code?

To fix B19FB: Visual inspection of the wiring harness and switch contacts. Checking the voltage in the switch circuit. Replacing the switch if a fault is detected. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B19FB?

Limited driving only, diagnose soon

How much does it cost to fix B19FB?

The estimated repair cost for B19FB is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat