P2E92: Charge Port Door B Open Request Switch Wake-Up Circuit

What it means

The wake-up circuit for the charge port door B open request switch reports a fault. Switch press may not wake the BMS for charge port unlocking.

At a glance

• Usually lights the check-engine light

How it works

The charge-port door B open-request switch has a wake-up circuit that signals the battery-management system when the driver requests access. This code indicates a fault in that wake-up path, so pressing the switch may not wake the system to unlock the port door.

Common causes

Most likely first.

1. Wake-up switch failed
2. Wiring fault

Symptoms

• Charge status indicator shows fault
• Charging may not start or interrupts
• Slower-than-expected charge rate

How to diagnose it

1. Read the body and charging-system codes, then check whether door B fails to respond specifically after the vehicle has gone to sleep.
2. Inspect the door B request switch, nearby wiring, and connectors for damage, moisture, corrosion, or a loose connection.
3. Use a scan tool to observe whether the battery-management system registers a wake-up request when the switch is pressed.
4. Test the wake-up circuit for continuity and shorts, following the manufacturer's safe procedure for the vehicle's high-voltage system.
5. If wiring is intact but no wake-up request is detected, test the switch and its wake-up output against the manufacturer's specification.

Common fixes

• Clean and secure the door B switch's wake-up circuit connector.
• Repair damaged or open wake-up wiring to the battery-management system.
• Replace the door B open-request switch if it fails its circuit test.

Can I keep driving?

The fault can leave charge port door B locked or prevent the vehicle from waking to release it, making charging inaccessible. Do not force the door; arrange another safe charging option if it will not open.