P2E97

Code

Generic P — Powertrain

Charge Port Door B Open Request Switch Circuit Intermittent/Erratic

Brand: Generic

Type: P — Powertrain

Views: UK: 57 EN: 33 RU: 21

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Page language: EN

Causes

Damaged or corroded wiring or connector for charge port door B switch
Poor connector contact or water intrusion in connector
Faulty charge port door B open-request switch (mechanical or internal failure)
Short to ground or battery voltage on the switch circuit
Intermittent BCM/door controller input or internal fault
Aftermarket equipment or recent repairs that disturbed wiring

Symptoms

Charge port door B does not open or closes unexpectedly
Charge port door B warning or malfunction message on dash
Intermittent ability to initiate charging on port B
DTC returns intermittently or after driving/washing vehicle
Related door-logic behaviors (locks/unlocks) may be abnormal

What to check

Read freeze frame and live data for the switch input while actuating the charge port door B switch
Visually inspect connector and wiring at charge port door, hinge area, and BCM/module for damage, corrosion, or water
Perform a wiggle test on harness while watching live data to reproduce the fault
Check connector pins for corrosion, bent pins or poor mating
Scan for related communication or power codes (U-codes) that could affect the input

Signal parameters

Typical switch behavior: two states only. Example expected levels — closed: ~0 V (ground), open: pull-up to supply (approx. 5–12 V) depending on vehicle design.
If the module uses a low-voltage logic input: closed ~0 V, open ~5 V.
Expected resistance across switch when actuated: near 0 Ω (closed); open circuit when released.
Intermittent/erratic: rapid toggling between these states or fluctuating voltage when switch is steady.

Diagnostic algorithm

Retrieve DTC details, freeze frame and monitor live data for the Charge Port Door B open-request switch while actuating the door switch manually and using the door-open command.
Confirm symptom: attempt to reproduce code by operating the door and performing wiggle tests on wiring near the port, hinge, and connector while watching the input value change.
Visually inspect connectors and wiring at the charge port door switch, door hinge, and at the BCM/door module. Look for chafing, pin corrosion, loose pins, water ingress or repair splices.
With vehicle in accessory or as specified by service manual, backprobe the switch signal pin and measure voltage to ground while operating the switch. Confirm stable transition between expected voltage levels (open vs closed).
If voltage is unstable or intermittent, disconnect connector and measure for corrosion or poor contact. Check continuity from switch pin to module pin. Repair any broken wires, poor crimps or corroded terminals.
If wiring and connector integrity are good, bench-test or replace the charge port door B switch and retest signal behavior.
If replacement switch does not correct intermittent signal, check the module/BCM input circuit for shorts to battery or ground and consider module diagnosis or replacement per manufacturer procedures.
After repair, clear DTCs, perform multiple actuation cycles and a road or soak/wash simulation if relevant to confirm the code does not return.
Safety note: when working near high-voltage or charging system components, follow vehicle-specific HV isolation procedures and use appropriate PPE. De-energize HV system before disconnecting HV connectors.

Likely causes

Frayed harness where it flexes near charge port or door hinge
Corroded terminals inside the charge port or module connector (moisture exposure)
Switch actuator intermittent due to mechanical wear or contamination
Loose connector pin at BCM or door module
Connector mis-seated after service