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 the car's computer is having trouble talking to the part that checks the battery's voltage.
The P163E code indicates a communication issue between the vehicle's main computer and the voltage monitoring control module.
The voltage monitoring control module is responsible for monitoring the voltage levels of the vehicle's electrical system. When the main engine control module (ECM) cannot communicate properly with this module, it triggers the P163E code. This could be due to wiring issues, a faulty module, or other communication problems.
• Check Engine Light is on
• Battery warning light may illuminate
• Possible charging system issues
• Faulty voltage monitoring control module
• Damaged or corroded wiring/connectors
• Software issues in the ECM
ECM: Engine Control Module - the computer that manages engine performance.
OBD-II: On-Board Diagnostics - a standardized system in vehicles for self-diagnostics and reporting.
• Scan the vehicle for codes and freeze frame data.
• Inspect wiring and connectors to the voltage monitoring control module.
• Test the voltage monitoring control module for proper operation.
• Repair or replace damaged wiring/connectors.
• Replace the voltage monitoring control module if faulty.
• Update ECM software if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $500
Moderate
• Ford Focus
• Chevrolet Silverado
• Volkswagen Jetta
• Regularly inspect electrical connections for corrosion.
• Ensure battery terminals are clean and tight.
• Perform regular vehicle maintenance checks.
Communication Error
• Avoid ignoring the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Keep a record of any repairs or maintenance performed.
Check with your vehicle manufacturer for warranty coverage on electrical components.
This code has been reported in vehicles with electrical system modifications or after battery replacements.
Moderate – It may not cause immediate issues, but should be addressed to avoid potential electrical problems.
Driving with a malfunctioning electrical system can lead to further vehicle damage or safety hazards.
• Vehicle in park with engine running
• All electrical accessories turned off
The voltage monitoring control module is typically located near the battery or integrated within the ECM.
Q: Can I drive with the P163E code?
A: It is possible to drive short distances, but it's best to have the issue diagnosed and repaired to avoid further problems.
Q: Does this code affect vehicle performance?
A: It may not directly affect performance, but it can lead to battery or charging system issues if not addressed.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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