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DTC B1221: Power Window Switch Circuit on Driver Door: Description

This DTC is output when any of the switches on the power window regulator master switch assembly is operated.

HINT: 

DTC No. DTC Detection Condition Trouble Area
B1221 Power window switch or door control switch on power window master switch is operating
  • Power window regulator master switch assembly
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness