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 the timer or clock that controls the power supply to part of the car's electric motor system.
The vehicle's control system has detected an issue with the timing or clock performance related to the power supply for the drive motor 'B' inverter transistor.
The P1E56 code indicates that the power supply timer or clock for the drive motor 'B' inverter transistor is not performing as expected. This could be due to a malfunction in the timing circuit, an issue with the inverter, or a problem with the power supply to the transistor.
• Check engine light on
• Reduced vehicle performance
• Unusual noises from the electric motor
• Faulty power supply timer or clock
• Malfunctioning drive motor 'B' inverter
• Wiring issues or poor connections
Inverter: A device that converts DC power from the battery to AC power for the electric motor.
Transistor: A semiconductor device used to amplify or switch electronic signals and electrical power.
• Check for any other related trouble codes.
• Inspect wiring and connections to the drive motor 'B' inverter.
• Test the power supply timer/clock circuit for faults.
• Repair or replace faulty wiring or connectors.
• Replace the drive motor 'B' inverter if necessary.
• Repair or replace the power supply timer/clock circuit.
• OBD-II scanner
• Multimeter
• Wiring diagram
$200 - $800
Moderate
• Chevrolet Volt
• Chevrolet Bolt
• Cadillac ELR
• Regular maintenance checks
• Ensure proper electrical connections
• Avoid overloading the vehicle's electrical system
Electrical System Issue
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult with a professional mechanic for a proper diagnosis.
Check the vehicle's warranty for coverage on electrical components.
This code is commonly associated with hybrid and electric vehicles, where inverter issues can affect performance.
High – This issue can affect vehicle performance and should be addressed promptly.
Driving with this code active may lead to reduced vehicle performance and potential safety hazards.
• Vehicle should be in a safe, stationary position.
• Ensure all electrical systems are functioning properly before testing.
The drive motor 'B' inverter is typically located near the vehicle's electric motor assembly.
Q: Can I drive my car with a P1E56 code?
A: It's not recommended as it can affect performance and may cause further damage.
Q: What causes a P1E56 code?
A: It can be caused by a faulty timer/clock, inverter issues, or wiring problems.
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