OBD Guide
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B120F

Left Heated Seat HI Indicator Control Circuit Open

B120F is an OBD-II diagnostic trouble code meaning: Left Heated Seat HI Indicator Control Circuit Open. Common causes: open or short circuit in wiring harness, heating indicator malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • The left seat heating indicator does not work
  • The heated seat may not work correctly
  • The malfunction lamp on the dashboard comes on

Causes

  • Open or short circuit in wiring harness
  • Heating indicator malfunction
  • Problems with the seat control unit
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the integrity of the wiring harness to the indicator
  2. Check the operation of the heating indicator
  3. Diagnose the seat control unit
  4. Replace damaged components

Related codes

B120EB1210B1211

FAQ

What does the B120F code mean?

B120F is an OBD-II diagnostic trouble code that indicates: Left Heated Seat HI Indicator Control Circuit Open

What causes a B120F error code?

The most common causes of B120F include: Open or short circuit in wiring harness; Heating indicator malfunction; Problems with the seat control unit; Corrosion or poor contact in connectors.

How do I fix a B120F diagnostic trouble code?

To fix B120F: Check the integrity of the wiring harness to the indicator. Check the operation of the heating indicator. Diagnose the seat control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B120F?

Limited driving only, diagnose soon

How much does it cost to fix B120F?

The estimated repair cost for B120F is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat