Hybrid Battery Voltage Sense Circuit Low
The P0B92 code indicates that the hybrid battery voltage sense circuit is reading lower than expected. This circuit monitors the voltage of the high-voltage hybrid battery pack. A low reading can be caused by a faulty battery voltage sensor, damaged wiring, or a weak battery cell. This condition may affect hybrid system operation and battery charging.
1. Symptoms You Will Notice
- Check hybrid system warning light on
- Reduced fuel economy or loss of hybrid assist
- Possible reduced engine power or limp mode
2. Most Common Causes
- Faulty hybrid battery voltage sensor
- Damaged or corroded wiring/connectors in the voltage sense circuit
- Weak or failing hybrid battery cells
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the hybrid battery voltage sensor wiring and connectors for damage or corrosion.
Step 3: Test the voltage sensor output with a multimeter and compare to manufacturer specifications.
Step 4: Check individual battery cell voltages to identify weak cells.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it may indicate a serious hybrid battery issue. The vehicle may enter limp mode or lose hybrid assist, and further damage could occur.
How much does it cost to fix?▼
The cost to fix P0B92 typically ranges from $100 to $300 for sensor replacement, but could be higher if battery cells need replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.