What it means
The power supply circuit B for the generator inverter reports a circuit/open condition. Inverter operation may be impaired.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Generator inverter power supply circuit B delivers electrical power needed for the generator inverter to operate. P2CC5 sets when the control module detects an open in that supply path, which may be caused by a broken wire, a blown fuse, or a connector terminal that has backed out.
Common causes
Most likely first.
- Open in supply wire
- Supply fuse blown
- Pin pushed back out of connector body
Symptoms
- Check-engine light
- Battery or charging system warning light
- Dim or flickering lights
- Difficulty starting or a discharged battery
How to diagnose it
- Check freeze-frame data and charging-system warnings to establish when the inverter supply fault occurred.
- With the vehicle off, inspect the circuit B fuse and accessible supply wiring for damage or disconnection.
- Inspect both ends of the supply circuit for loose connectors, corrosion, or a pushed-back terminal.
- If the fuse is blown, check the supply circuit for a short or overload before fitting a replacement of the specified type.
- Test circuit B continuity from the supply source to the inverter connector using the wiring diagram.
- If supply wiring and connectors pass, check for power at the inverter under the manufacturer’s specified conditions.
Common fixes
- Reconnect a loose circuit B supply connector.
- Restore a backed-out terminal to its proper position or replace the damaged connector.
- Repair an open or damaged supply wire.
- Replace a blown fuse with the specified type after checking for a cause.
- Repair the inverter supply connection if testing confirms an internal fault.
Can I keep driving?
Avoid relying on the vehicle for extended trips if the charging warning is on, lights are dim, or starting is difficult; loss of inverter supply can impair charging and leave the battery depleted. Reduce electrical loads and stop safely if the vehicle’s electrical systems begin to fail.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.