Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a sensor that checks the electric current in the car's motor. It's saying the current is too high.
The P1B55 code indicates that the current sensor for the drive motor's phase V is detecting a current level that is higher than expected.
The P1B55 code is triggered when the Powertrain Control Module (PCM) or the Battery Energy Control Module detects an out-of-range high condition in the current sensor circuit for Drive Motor 'A' Phase V. This could be due to a malfunctioning sensor, wiring issues, or a fault in the drive motor itself.
• Check engine light on
• Reduced vehicle performance
• Unusual noises from the motor
• Faulty current sensor
• Wiring issues or short circuits
• Malfunctioning drive motor
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the current sensor for proper operation.
• Replace the faulty current sensor.
• Repair or replace damaged wiring.
• Inspect and repair the drive motor if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $500
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance checks
• Timely inspection of electrical systems
• Avoiding overloading the vehicle
Sensor Issue
• Have a professional inspect your vehicle.
• Do not ignore the check engine light.
Check with your vehicle manufacturer for warranty coverage on electric drive components.
This code has become more common with the increase in electric and hybrid vehicles.
Moderate – Addressing this issue promptly can prevent further damage.
Driving with a malfunctioning motor sensor can lead to reduced performance and potential safety hazards.
• Vehicle in 'On' position
• Motor running
The current sensor is typically located near the drive motor or within the motor control module.
Q: Can I drive with a P1B55 code?
A: It's not recommended to drive for long with this code as it can lead to further damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of your vehicle's electrical systems can help prevent this issue.
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