Powertrain, generic (extended)

P2D7A Charging Stop Switch Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2D7A means the voltage on the charging stop switch line stays above the band the control unit accepts. This refers to the signal, not to the button position: typical causes are a broken wire or switch contact on a line held up by a pull-up resistor, or a short to a supply voltage. No manufacturer documents P2D7A publicly. What the driver notices depends on the circuit layout. If high is the idle level, an open line looks like a button never pressed, so charging can only be ended by unplugging. If the switch pulls the line up when pressed, the fault mimics a held button, the case Toyota's patent calls a closed failure, and charging will not start at all. The low counterpart is P2D7B, the start switch equivalent P2D7F.

Likely causes

Open circuit in the stop switch line or connector (pull-up design)
Stop switch signal wire chafed through and touching a supply voltage
Burnt or broken contact inside the stop switch

Symptoms

  • Charging does not start although the plug is connected
  • Pressing the stop button has no effect during charging

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

P2D7BP2D79P2D7CP2D7F

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