OBD Guide
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B1548

Power Window Master Circuit Open

B1548 is an OBD-II diagnostic trouble code meaning: Power Window Master Circuit Open. Common causes: broken wires in the harness, oxidation of contacts in connectors. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • Power windows don't work
  • Lack of response to pressing control buttons
  • Blown power window circuit fuse

Causes

  • Broken wires in the harness
  • Oxidation of contacts in connectors
  • Main control unit malfunction
  • Fuse damage
  • Short circuit in the circuit

How to Fix

  1. Check the power window circuit fuse
  2. Visually inspect the wiring harness for damage.
  3. Test the control circuit with a multimeter
  4. Check the contacts in the connectors for oxidation
  5. If necessary, replace the main control module

Related codes

B1545B1546B1547

FAQ

What does the B1548 code mean?

B1548 is an OBD-II diagnostic trouble code that indicates: Power Window Master Circuit Open

What causes a B1548 error code?

The most common causes of B1548 include: Broken wires in the harness; Oxidation of contacts in connectors; Main control unit malfunction; Fuse damage.

How do I fix a B1548 diagnostic trouble code?

To fix B1548: Check the power window circuit fuse. Visually inspect the wiring harness for damage.. Test the control circuit with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1548?

Do not drive — repair immediately

How much does it cost to fix B1548?

The estimated repair cost for B1548 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat