A faulty charge port door open request switch that is stuck closed or has high internal resistance; A short to ground in the signal wire between the switch and the charge port door control module; Corrosion or water intrusion in the switch connector or the module connector, common on charge port doors exposed to weather; A damaged wire harness at the hinge point of the charge port door where flexing occurs; A failed charge port door control module that misreads the switch voltage; A poor ground connection for the switch or the module, causing a reference voltage drop; Aftermarket or damaged charge port components that alter the circuit resistance

DTC codes / P0Cxx · Hybrid propulsion / P0CC9

P0CC9Charge Port Door A Open Request Switch Circuit Low

Q: What does code P0CC9 mean?

Charge Port Door A Open Request Switch Circuit Low. P0CC9 means the charge port door control module has detected a low-voltage condition on the 'open request' switch circuit, which is the signal line that tells the module the driver wants the charge door to open. The computer expects to see a specific voltage on that circuit when the switch is at rest and a different voltage when pressed, and a reading below the acceptable threshold for too long sets this code.

P0CC9 means the charge port door control module has detected a low-voltage condition on the 'open request' switch circuit, which is the signal line that tells the module the driver wants the charge door to open. The computer expects to see a specific voltage on that circuit when the switch is at rest and a different voltage when pressed, and a reading below the acceptable threshold for too long sets this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

The charge port door will not open when you press the release button or switch
The charge port door opens intermittently or only after multiple presses
A warning light or message on the dash indicating a charge port door fault
The charge port door may open on its own without any switch input
Often no symptoms besides the warning light, especially if the door still opens manually
In some vehicles, the vehicle may refuse to start charging because it cannot confirm the door state

Common causes, most likely first

A faulty charge port door open request switch that is stuck closed or has high internal resistance
A short to ground in the signal wire between the switch and the charge port door control module
Corrosion or water intrusion in the switch connector or the module connector, common on charge port doors exposed to weather
A damaged wire harness at the hinge point of the charge port door where flexing occurs
A failed charge port door control module that misreads the switch voltage
A poor ground connection for the switch or the module, causing a reference voltage drop
Aftermarket or damaged charge port components that alter the circuit resistance

How to diagnose and fix it

Use a scan tool to read the charge port door switch data and confirm the low-voltage condition matches the code
Visually inspect the charge port door switch, connector, and wiring for corrosion, water damage, or physical damage
Disconnect the switch and measure resistance across its terminals while pressing and releasing it, comparing to specifications
Check the signal wire from the switch to the module for a short to ground using a multimeter and wiring diagram
Inspect the harness at the door hinge for chafing or broken strands, and repair as needed
Verify the module ground and power supply are clean and tight before condemning the module
If all wiring and the switch test good, replace the charge port door control module and recheck for the code

Charge port door switch faults that fool technicians

A switch that tests fine with a multimeter can still set this code intermittently when water enters the connector and temporarily shorts the signal to ground.
The charge port door open request switch often shares a ground with other body controls, so a bad ground elsewhere can cause a low-voltage reading on this circuit without any fault in the switch itself.
Some vehicles use a hall-effect or proximity switch rather than a simple mechanical contact, and a low voltage code can be set by a misadjusted switch rather than a failed one.
The code can be stored by a brief short to ground during a car wash or heavy rain, and it may not return after the connector dries out, so clear the code and recheck before replacing parts.
A charge port door that has been manually forced open or closed can bend the switch actuator and cause a constant low signal that mimics a wiring short.

Can I keep driving with P0CC9?

You can generally drive the vehicle with this code because it does not affect the powertrain, but you may be unable to open the charge port door to recharge, so avoid long trips that require charging until it is fixed. Do not force the door open, as that can damage the switch and latch assembly further.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.