P303B
Hybrid/EV Battery Interface Control Module 12 Not Programmed
P303B is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 12 Not Programmed. Common causes: battery management module was not programmed after replacement, module software failure. Estimated repair cost: $56–222.
Symptoms
- Check Engine light comes on
- Vehicle power limitation
- Inability to start the engine
- Error message on display
- Reduced performance of the hybrid system
Causes
- Battery management module was not programmed after replacement
- Module software failure
- Problems with communication between modules
- Incorrect module installation
- Module memory corruption
How to Fix
- Diagnostics using a specialized scanner for hybrid/electric vehicles
- Reprogramming the Battery Management Module
- Checking the module connections and wiring harness
- System Software Update
- If necessary, replace the control module
Related codes
FAQ
What does the P303B code mean?
P303B is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 12 Not Programmed
What causes a P303B error code?
The most common causes of P303B include: Battery management module was not programmed after replacement; Module software failure; Problems with communication between modules; Incorrect module installation.
How do I fix a P303B diagnostic trouble code?
To fix P303B: Diagnostics using a specialized scanner for hybrid/electric vehicles. Reprogramming the Battery Management Module. Checking the module connections and wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P303B?
Do not drive — repair immediately
How much does it cost to fix P303B?
The estimated repair cost for P303B is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat