The high-voltage interlock circuit of battery charging system B reports a circuit intermittent/erratic condition. Safety interlock chain may be compromised.
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
- Interlock signal interrupted
- Interlock connector not seated
- Connector with intermittent contact under vibration
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
What each character of P2DBB means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- D: Subsystem depends on the code range
- BB: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2DBB?
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 P2DBB?
The most common causes are: interlock signal interrupted; interlock connector not seated; connector with intermittent contact under vibration.
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.