Hybrid Battery Voltage Sense Circuit Low
The P0B97 code indicates that the hybrid battery voltage sense circuit is reporting a voltage lower than expected. This circuit monitors the voltage of the hybrid battery pack to ensure proper charging and discharging. A low voltage reading can be caused by a faulty battery voltage sensor, damaged wiring, or a weak hybrid battery. This condition may lead to reduced hybrid system performance and potential battery damage if not addressed.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Hybrid system warning light on
- Possible loss of hybrid assist or reduced power
2. Most Common Causes
- Faulty hybrid battery voltage sensor
- Damaged or corroded wiring/connectors in the voltage sense circuit
- Weak or failing hybrid battery pack
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 and wiring for damage, corrosion, or loose connections.
Step 3: Measure the voltage at the sensor connector and compare to manufacturer specifications.
Step 4: If sensor and wiring are okay, test the hybrid battery pack voltage and individual cell voltages.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can lead to further hybrid battery damage or complete system failure. Have the vehicle inspected as soon as possible.
How much does it cost to fix?▼
The cost to fix P0B97 typically ranges from $50 to $150 for diagnosis and sensor replacement, but could be higher if the hybrid battery pack needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.