Powertrain, generic (extended)

P2D7D Charging Stop Switch Circuit Intermittent/Erratic

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2D7D flags a stop switch signal that jumps between states without a matching button press, or drops out briefly and returns. Since the charging control treats a stop signal as an order to end charging, as both the Toyota and the Honda patents describe, a flickering line can end a session without anyone touching the button. No manufacturer documents P2D7D publicly. Faults that come and go point to a loose terminal, a cracked solder joint in the switch, a chafed wire that touches metal only when the body flexes, or moisture that dries out again. Unlike P2D7A and P2D7B, the measured level is mostly in range, so stored freeze-frame data and a wiggle test are the main tools. Owners typically find that charging stopped overnight for no visible reason.

Likely causes

Loose or fretting terminal at the stop switch connector
Cracked solder joint or worn contact inside the switch
Wire chafing that shorts only intermittently

Symptoms

  • Charging stops unexpectedly, e.g. overnight
  • Battery not full in the morning despite being plugged in

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–400
Time0.5–3 h

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

Parts involved

charging stop switchwiring harness

Related codes

P2D79P2D7CP2D82

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