B1478

Caution

Power Window One Touch Up/Down Activated Simultaneously

Severity
Caution
Category
Body
Code Type
Manufacturer Specific
Applicable Regions
US, EU, Global

Is it safe to drive?

🔵 Do not use this page as drive-clearance. Monitor the alert and arrange service if it returns.

What does B1478 mean?

B-code B1478 means "Power Window One Touch Up/Down Activated Simultaneously". It is a manufacturer-specific diagnostic trouble code (DTC) in the body electronics. A fault has been detected in the power window one touch up/down activated simultaneously — the control module has logged this condition during self-diagnostics. This code can be monitored, but service is recommended to prevent escalation. This code applies to OBD-II compliant electric and hybrid vehicles.

Possible Causes

  • Faulty or failed component in the body electronics
  • Damaged or corroded wiring and electrical connectors
  • Control module software error or firmware fault
  • Poor or missing ground connection at the affected module

Recommended Actions

  1. 1 Note the alert and schedule a diagnostic appointment when convenient
  2. 2 Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside B1478
  3. 3 Inspect the body electronics component and its wiring for visible damage
  4. 4 Check for water intrusion in connector areas and clean contacts if corroded
  5. 5 Clear the DTC, road-test the vehicle, and re-scan to confirm whether the fault returns
  6. 6 If the fault persists after inspection and clearing, consult an EV-certified technician for component replacement

Related Body fault codes

B1200 Climate Control Pushbutton Circuit Failure B1201 Fuel Sender Circuit Failure B1202 Fuel Sender Circuit Open B1203 Fuel Sender Circuit Short To Battery B1204 Fuel Sender Circuit Short To Ground B1205 EIC Switch-1 Assembly Circuit Failure B1206 EIC Switch-1 Assembly Circuit Open B1207 EIC Switch-1 Assembly Circuit Short To Battery