Powertrain, generic (extended)

P2D7B Charging Stop Switch Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2D7B is stored when the charging stop switch line is pulled below its permitted voltage, most often by a short to ground in the wiring, water in the switch or a contact that no longer opens on a switch that grounds the line when pressed. No manufacturer documents P2D7B publicly. Here the effect is mostly the reverse of P2D7A: on the common ground-switching layout a grounded line reads as a stop button held down. Toyota describes exactly this situation for its charging stop switch, where a permanent stop request blocks the start of charging, and adds a user procedure to override the stuck button. If instead low is the idle level, the stop request is lost. The high counterpart is P2D7A; the start switch has its own low code, P2D80.

Likely causes

Stop switch signal wire shorted to body ground
Moisture or corrosion bridging the stop switch contacts
Stop switch contact stuck closed (ground-switching design)

Symptoms

  • Charging does not begin or ends immediately after plugging in
  • Charging indicator shows no active session

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–400
Time0.5–2.5 h

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

Parts involved

charging stop switchwiring harness

Related codes

P2D7AP2D79P2D7DP2D80

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