OBD Guide
ENFRDEESPT

B1478

Power Window One Touch Up/Down Activated Simultaneously

B1478 is an OBD-II diagnostic trouble code meaning: Power Window One Touch Up/Down Activated Simultaneously. Common causes: power window switch malfunction, short circuit in control circuit. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • One Touch feature doesn't work
  • The windows only work when the switch is held down.
  • Fault indication on the instrument panel

Causes

  • Power window switch malfunction
  • Short circuit in control circuit
  • Software failure of the power window module
  • Wiring harness damage

How to Fix

  1. Check operation of power window switches
  2. Check the integrity of the control circuit
  3. Update power window module software
  4. Check wiring harness for damage

Related codes

B1477B1479

FAQ

What does the B1478 code mean?

B1478 is an OBD-II diagnostic trouble code that indicates: Power Window One Touch Up/Down Activated Simultaneously

What causes a B1478 error code?

The most common causes of B1478 include: Power window switch malfunction; Short circuit in control circuit; Software failure of the power window module; Wiring harness damage.

How do I fix a B1478 diagnostic trouble code?

To fix B1478: Check operation of power window switches. Check the integrity of the control circuit. Update power window module software. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1478?

Yes, but get it checked soon

How much does it cost to fix B1478?

The estimated repair cost for B1478 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat