Body, generic

B0245 Driver Window Switch Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0245 is unknown to every publicly available J2012 source and undocumented by carmakers, so nothing public backs it; driver window faults have the code B0500. The driver's door usually holds the master switch block, which commands its own window and, by signal lines or a bus, the other doors. Honda's patent US7145299B2 replaces two heavy wires per door with a single line that the master ties to battery for up, to ground for down and leaves floating for stop, so contact wear and relay surges no longer stress the switch. A circuit code here means the module sees a switch state that cannot be right, such as a contact held closed by corrosion or a broken line. Windows that can close on their own must reverse before pressing 100 N under FMVSS 118.

Likely causes

Master switch contacts corroded or sticking, often after drinks or rain got into the door panel
Wires broken in the rubber boot between body and driver's door
Plug of the switch block loose or with pushed-back pins

Symptoms

  • Driver's window or other windows do not respond to the master switch
  • A window moves on its own or the one-touch function misbehaves

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–250
Time0.5–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

window switchdoor wiring harnessbody control module

Related codes

B0247B0252B0500

References: patents.google.com, law.cornell.edu, patents.google.com.