P2DB9
Battery Charging System B High Voltage Interlock Circuit Low
P2DB9 is an OBD-II diagnostic trouble code meaning: Battery Charging System B High Voltage Interlock Circuit Low. Common causes: open or short circuit in the interlock circuit, high voltage sensor fault. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced battery charging efficiency
- Problems starting the engine
- Hybrid system power reduction
Causes
- Open or short circuit in the interlock circuit
- High voltage sensor fault
- Problems with the hybrid system control module
- Corrosion or poor contact in connectors
How to Fix
- Check the integrity of the high voltage blocking circuit
- Check high voltage sensors for serviceability
- Inspect connectors and contacts for corrosion or damage
- Scan the hybrid system control module for errors
- Repair only from an authorized dealer
Related codes
Error P2DB9 by Vehicle Brand
FAQ
What does the P2DB9 code mean?
P2DB9 is an OBD-II diagnostic trouble code that indicates: Battery Charging System B High Voltage Interlock Circuit Low
What causes a P2DB9 error code?
The most common causes of P2DB9 include: Open or short circuit in the interlock circuit; High voltage sensor fault; Problems with the hybrid system control module; Corrosion or poor contact in connectors.
How do I fix a P2DB9 diagnostic trouble code?
To fix P2DB9: Check the integrity of the high voltage blocking circuit. Check high voltage sensors for serviceability. Inspect connectors and contacts for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2DB9?
Do not drive — repair immediately
How much does it cost to fix P2DB9?
The estimated repair cost for P2DB9 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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