What are the common causes of P2DD2?

A loose or chafed control pilot switch B wire. An intermittent control pilot switch B. Corrosion at the control pilot connector. A loose charge port ground. Water in the charge port connector.

Wiggle test the control pilot switch B wiring. Inspect the charge port connector for corrosion. Check the charge port ground. Monitor the control pilot voltage for dropouts. Repair the intermittent control pilot wire. Clear the code and retest.

P2DD2

Control Pilot Charging Switch B Intermittent/Erratic

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P2DD2 means Control Pilot Charging Switch B Intermittent/Erratic.

Where it lives

For P2DD2, the description names the switch as the part involved.

Check these first

A loose or chafed control pilot switch B wire
An intermittent control pilot switch B
Corrosion at the control pilot connector
A loose charge port ground
Water in the charge port connector

What to do next

Wiggle test the control pilot switch B wiring
Inspect the charge port connector for corrosion
Check the charge port ground
Monitor the control pilot voltage for dropouts
Repair the intermittent control pilot wire
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.