Hybrid Battery Voltage Sense Circuit Intermittent/Erratic
The P0B67 code indicates that the hybrid battery voltage sense circuit is experiencing intermittent or erratic signals. This circuit monitors the voltage of the hybrid battery pack and sends data to the hybrid control module. An intermittent fault can cause inaccurate voltage readings, leading to improper battery charging or discharging, reduced fuel economy, and potential drivability issues. The problem may stem from loose or corroded connectors, damaged wiring, or a failing battery voltage sensor.
01. Most Common Causes
- Loose or corroded battery voltage sensor connector
- Damaged or chafed wiring in the voltage sense circuit
- Faulty hybrid battery voltage sensor
- Intermittent short or open in the circuit
02. Symptoms You Will Notice
- Check Engine Light or Hybrid System Warning Light on
- Reduced fuel economy or decreased hybrid system performance
- Battery not charging properly or erratic state of charge readings
- Possible hesitation or loss of power during acceleration
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the hybrid battery voltage sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Perform a voltage drop test on the sensor circuit to identify intermittent opens or shorts.
Step 4: If wiring is intact, test the voltage sensor output with a multimeter while wiggling the harness to reproduce the intermittent fault.
Step 5: Replace the sensor or repair wiring as needed, then clear the code and test drive to confirm repair.
04. Commonly Affected Makes
05. 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 improper battery management, reduced performance, and potential damage to the hybrid battery system. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether it's a simple connector cleaning or sensor replacement. Labor rates vary by shop.