Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the battery's voltage sensor. It's like when a thermometer gives a wrong reading because it's broken.
The P1B15 code indicates that the voltage reading from the battery pack is higher than expected, suggesting a potential issue with the sensor or the circuit.
The P1B15 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects a voltage level in the battery pack voltage sense 'E' circuit that is higher than the calibrated threshold. This could be due to a fault in the sensor, wiring, or connectors.
• Illuminated check engine light
• Reduced vehicle performance
• Possible battery charging issues
• Faulty battery voltage sensor
• Damaged wiring or connectors in the voltage sense circuit
• Malfunctioning Battery Energy Control Module (BECM)
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the battery voltage sensor and its wiring for damage.
• Test the voltage sensor and circuit for proper operation.
• Replace the faulty battery voltage sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the Battery Energy Control Module (BECM) if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regular maintenance of the hybrid/EV battery system
• Inspect wiring and connectors periodically
• Ensure proper charging practices
Sensor Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if unsure.
Repairs may be covered under the vehicle's hybrid/EV battery warranty.
This code has been associated with hybrid and electric vehicles as battery technology has advanced.
Moderate – It should be addressed soon to prevent further issues.
Driving with a faulty battery sensor could lead to reduced performance and efficiency.
• Vehicle must be in 'ready' mode.
• Battery pack must be charged.
The battery voltage sensor is typically located within or near the hybrid/EV battery pack.
Q: Can I drive my car with this code?
A: It's possible to drive, but it's not recommended as it may lead to further issues.
Q: How do I reset the check engine light?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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