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 isn't working right. It's like if a toy that needs batteries isn't getting enough power to work properly.
The DC/DC converter is responsible for converting high voltage from the battery to a lower voltage for the car's electrical systems. This code indicates that the voltage sensor for the converter is reading lower than expected.
The P0E38 code is triggered when the Powertrain Control Module (PCM) detects a low voltage signal from the DC/DC converter voltage sensor B. This sensor monitors the output voltage of the DC/DC converter, which is crucial for maintaining the correct voltage levels for the vehicle's electrical systems.
• Check Engine Light is on
• Electrical systems not functioning properly
• Reduced fuel efficiency
• Faulty DC/DC converter voltage sensor
• Wiring issues or poor connections
• Malfunctioning DC/DC converter
DC/DC Converter: A device that converts direct current (DC) from one voltage level to another.
PCM: Powertrain Control Module, the computer that controls the engine and transmission.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the DC/DC converter voltage sensor with a multimeter.
• Replace the faulty voltage sensor.
• Repair or replace damaged wiring or connectors.
• Replace the DC/DC converter if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance checks
• Ensure battery terminals are clean and secure
• Avoid overloading electrical systems
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid using high-power electrical systems until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on electrical components.
This code is common in hybrid and electric vehicles due to their complex electrical systems.
Moderate – While the car may still operate, it could lead to more significant issues if not addressed.
Driving with a malfunctioning electrical system can be unsafe. Address the issue promptly to ensure vehicle safety.
• Vehicle must be in a safe, stationary position.
• Ensure the battery is fully charged before testing.
The DC/DC converter is typically located near the vehicle's battery or under the hood.
Q: Can I drive my car with this code?
A: It's not recommended to drive for long periods with this code, as it may affect your car's electrical systems.
Q: Is this a common problem?
A: Yes, this issue is more common in hybrid and electric vehicles due to their reliance on complex electrical systems.
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