P0C0E: Drive Motor B Inverter Power Supply Circuit/Open
What to do
As P0C0B — and note the run to a rear inverter is longer, with more joints along it.
What this code means
The high-voltage supply feeding drive motor B's inverter is missing or open.
The DC-side-versus-AC-side argument, and the discriminator it gives, are at P0C0B. Motor B is normally the second machine, so its supply may run the length of the car to a rear inverter — a longer run with more joints in it.
Likely causes
Start here
- Corroded or loose connector · specialist
- Faulty battery contactor · specialist
Less common
- Damaged high voltage cable insulation · specialist
- Faulty power inverter · specialist
Rare
- Welded battery contactor · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P0C0E.