P2BCC: Battery Charging System Negative Contactor B Stuck Closed

The negative contactor B of the battery charging system reports a stuck closed condition. HV charging path cannot be commanded reliably.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Most likely causes

Contactor contacts welded closed
Output driver stuck on
Carbon or debris buildup preventing free movement

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Use the scanner to command the movement and compare the actual position with the requested one.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

Repair difficulty: hard
It can trigger limp mode.

What each character of P2BCC means

P: Powertrain: engine and transmission
2: Generic code: same on every make
B: Subsystem depends on the code range
CC: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2BCC?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P2BCC?

The most common causes are: contactor contacts welded closed; output driver stuck on; carbon or debris buildup preventing free movement.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.