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 part of the car's computer is not getting the right amount of power it needs to work properly.
The power supply to the control module is not within the expected range, which can affect its performance.
The P16E8 code indicates that the voltage supply to the internal control module (specifically Voltage 2) is not performing as expected. This can be due to fluctuations, interruptions, or incorrect voltage levels reaching the module, which can affect its operation.
• Check engine light on
• Vehicle may not start
• Poor engine performance
• Faulty alternator
• Bad wiring or connections
• Defective control module
Control Module: A computer that manages various functions in the vehicle.
Voltage: The electrical potential difference, which powers electronic components.
• Check the battery and charging system
• Inspect wiring and connectors for damage
• Test the control module for proper operation
• Replace faulty alternator
• Repair or replace damaged wiring
• Replace the control module if necessary
• Multimeter
• OBD-II scanner
• Basic hand tools
$150 - $600
Moderate
• Chevrolet Malibu
• GMC Sierra
• Buick Enclave
• Regular battery maintenance
• Check electrical connections periodically
• Ensure alternator is functioning properly
Electrical Issue
• Do not ignore the check engine light
• Have your vehicle inspected by a professional
• Avoid driving if the vehicle shows severe symptoms
Check with your manufacturer for warranty coverage on control module issues.
This code has been reported in vehicles with electrical system issues, often related to alternator or wiring problems.
Moderate – Should be addressed soon to avoid potential vehicle performance issues.
Driving with a malfunctioning control module can lead to unsafe driving conditions.
• Vehicle at operating temperature
• Engine running
The control module is typically located in the engine compartment or under the dashboard.
Q: Can I drive with a P16E8 code?
A: It's not recommended as it can lead to further issues. Have it checked as soon as possible.
Q: Will a dead battery cause a P16E8 code?
A: Yes, a weak or dead battery can cause voltage issues leading to this code.
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