P2D7C: Charging Stop Switch Circuit Performance

What it means

The charging stop switch reports a circuit performance condition. Charging termination cannot be reliably commanded by the operator.

At a glance

• Usually lights the check-engine light

How it works

The charging stop switch lets the driver request that a charging session end. The control module compares the switch signal with the expected response and sets this code when the circuit performs inconsistently, such as when aged contacts or a high-resistance connection prevent a reliable stop command.

Common causes

Most likely first.

1. Switch contacts aged
2. High-resistance contact

Symptoms

• Charging may stop unreliably when requested
• Charging session may end unexpectedly

How to diagnose it

1. Check freeze-frame data and watch stop-switch status on a scan tool while repeatedly pressing and releasing the switch, noting delayed or inconsistent changes.
2. With charging safely stopped, inspect the stop switch and connector for worn contacts, corrosion, looseness, or heat damage.
3. Check the harness and connector for high-resistance contact or damage, following the manufacturer's wiring information.
4. Test switch continuity and circuit response through repeated operations against the manufacturer's specification.
5. Repair the poor connection or replace the faulty switch, then confirm that a stop request reliably ends charging.

Common fixes

• Clean and secure a high-resistance or corroded connector.
• Repair damaged wiring or terminals in the stop-switch circuit.
• Replace a stop switch with worn contacts.

Can I keep driving?

The stop request may not work consistently, so monitor charging and have the approved alternative termination method available. Stop the session if it cannot be ended reliably.