Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble talking to other parts of the car. It's like when your phone can't send messages to your friends.
This code indicates a problem with the internal control module's ability to send monitoring messages over the CAN (Controller Area Network) bus.
The code P1652 is triggered when the internal control module detects a fault in its ability to send monitoring messages via the CAN bus. The CAN bus is a communication network that allows different parts of the vehicle to communicate with each other. If the control module cannot send messages properly, it can lead to various issues in the vehicle's operation.
• Check Engine Light is on
• Intermittent electrical issues
• Vehicle may not start or may stall
• Faulty internal control module
• Damaged or corroded wiring or connectors
• Faulty CAN bus communication
CAN: Controller Area Network, a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnostics and reporting.
• Use an OBD-II scanner to confirm the code
• Inspect wiring and connectors for damage or corrosion
• Test the internal control module for proper operation
• Repair or replace damaged wiring or connectors
• Replace the faulty internal control module
• Reprogram the control module if necessary
• OBD-II scanner
• Multimeter
• Screwdrivers
$300 - $1000
Moderate
• Ford Focus
• Chevrolet Silverado
• Honda Accord
• Regular maintenance checks
• Ensure all software updates are installed
• Keep wiring and connectors clean and dry
Communication Error
• Have the vehicle inspected by a professional
• Avoid driving the vehicle if it shows severe symptoms
Check with your vehicle manufacturer for warranty coverage on control modules.
This code has been reported in vehicles with aging electronic systems or those exposed to harsh environments.
Moderate – It should be addressed soon to avoid further issues.
Ignoring this code may lead to safety issues due to potential loss of vehicle control.
• Vehicle must be running
• All electronic systems should be active
The internal control module is typically located under the dashboard or in the engine compartment.
Q: Can I drive with a P1652 code?
A: It's not recommended to drive with this code as it may lead to further issues.
Q: Is a P1652 code serious?
A: Yes, it can affect vehicle communication and performance, so it should be addressed promptly.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.