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 a part of the car that changes electricity from one form to another is getting too much power. It's like when a light bulb gets too much electricity and might burn out.
The DC/DC converter in a hybrid or electric vehicle is responsible for converting high-voltage electricity from the battery to a lower voltage for use by the vehicle's electrical systems. The voltage sensor monitors this process, and a 'high' reading indicates that the voltage is higher than expected.
The P0E39 code is triggered when the powertrain control module (PCM) detects a voltage level from the DC/DC converter's voltage sensor B that is higher than the manufacturer's specified range. This could indicate a malfunction in the converter, the sensor, or related wiring.
• Check Engine Light is on
• Electrical systems not functioning properly
• Possible battery charging issues
• Faulty DC/DC converter
• Defective voltage sensor
• Wiring issues such as shorts or open circuits
DC/DC Converter: A device that converts direct current (DC) from one voltage level to another.
Voltage Sensor: A component that measures the voltage level in a circuit.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the DC/DC converter.
• Test the voltage sensor for proper operation.
• Replace or repair faulty wiring or connections.
• Replace the voltage sensor if defective.
• Replace the DC/DC converter if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $1000
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure proper battery charging procedures
• Inspect electrical connections periodically
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle if electrical systems are malfunctioning.
Check with the vehicle manufacturer for warranty coverage on hybrid system components.
This code has become more common with the increasing number of hybrid and electric vehicles on the road.
Moderate – Addressing this issue promptly can prevent further electrical system problems.
Driving with a malfunctioning electrical system can be unsafe. Ensure repairs are made by qualified personnel.
• Vehicle at operating temperature
• Battery fully charged
The DC/DC converter is typically located near the vehicle's battery or under the hood.
Q: Can I drive with a P0E39 code?
A: It's not recommended to drive with this code as it may lead to electrical system failures.
Q: How can I reset the P0E39 code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
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