P0CC9

What it means

P0CC9 means the control unit that manages the charge port door saw a low voltage on the circuit from the charge port door open request switch. The signal was lower than the expected range, which points to a short to ground, a wiring fault or a faulty switch. The location and type of the switch, and which module monitors it, depend on the model.

Symptoms

• Charge port door will not open when the open request switch or button is pressed
• Charge port door stuck open or closed, or behaving inconsistently
• Warning light or message about the charging system or charge port
• Charging cannot be started because the door or connector cannot be accessed
• Fault stored with no obvious change in how the car drives

Possible causes

• Open request switch faulty or stuck in the pressed position, holding the circuit lowlikely
• Signal wire chafed or shorted to ground in the harness near the charge port or doorlikely
• Water ingress or corrosion in the switch or connector, pulling the signal lowpossible
• Damaged, loose or contaminated connector pins at the switch or control modulepossible
• Fault in the control module that supplies or reads the switch circuit, such as a failed internal pull-uprare
• Faulty or outdated module software, only where the manufacturer has published a known fix for this coderare

How to diagnose

1. Read all stored codes and freeze frame data, then note whether other charge port, door lock or body control codes are present
2. Check whether the fault is current or intermittent by clearing it once and seeing if it returns when the switch is operated
3. Visually inspect the charge port area, door, switch and harness for water, corrosion, impact damage or chafing
4. Operate the switch while watching live data, if available, to see whether the switch state changes or stays fixed
5. Disconnect the switch connector and inspect the pins, then check whether the fault changes from circuit low to circuit open
6. Check the signal wire for a short to ground and for continuity, and check the switch resistance, using the manufacturer's wiring diagram
7. Check the supply and reference voltage at the switch connector against the specification for that model
8. Check for technical bulletins or software updates for the specific model before replacing a control module

How to fix

• Replace the open request switch if it is stuck, worn or reads out of specification
• Repair or replace the damaged section of wiring that is shorted to ground
• Clean, dry and repair corroded connectors, replace damaged terminals and seal against water
• Replace the affected control module only after wiring and switch faults are ruled out, and carry out any required setup
• Apply a manufacturer software update only where an outdated or faulty calibration is a documented cause
• Clear the code and confirm the door opens and closes normally and that charging works

Can I keep driving?

Nearby codes

• P0CC8GenericCharge Port Door A Open Request Switch Circuit Performance
• P0CCAGenericCharge Port Door A Open Request Switch Circuit High