Hybrid Battery Pack Voltage Sense Circuit Low
The P0B16 code indicates that the hybrid battery pack voltage sensor circuit is reporting a voltage lower than expected. This sensor monitors the voltage of the high-voltage hybrid battery pack. A low voltage reading can be caused by a faulty sensor, wiring issues, or a weak battery pack. This condition may affect hybrid system operation and fuel economy.
01. Most Common Causes
- Faulty hybrid battery voltage sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Weak or failing hybrid battery pack
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Hybrid system warning message on dashboard
- Possible loss of hybrid assist or reduced power
03. 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 its wiring for damage or corrosion.
Step 3: Measure the voltage at the sensor connector and compare to manufacturer specifications.
Step 4: If voltage is low, check the hybrid battery pack voltage directly to determine if the pack is weak.
Step 5: Replace the sensor if it is faulty, or repair wiring issues as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive with this code as it may indicate a failing hybrid battery, which could lead to a loss of power or unsafe driving conditions. Have the vehicle inspected as soon as possible.
How much does it cost to fix?▼
The cost to diagnose and repair a P0B16 code typically ranges from $50 to $150 for diagnosis, plus parts and labor for sensor replacement or wiring repair. Hybrid battery replacement can be significantly more expensive.