Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is having trouble talking to one of its parts because they don't speak the same language version.
The P1719 code indicates a communication error between the vehicle's control modules due to a mismatch in the CAN (Controller Area Network) protocol version.
The P1719 code is triggered when the vehicle's control modules detect a discrepancy in the CAN protocol version being used for communication. This can occur if one module is using an outdated or incompatible version of the protocol, leading to a failure in data exchange.
• Check Engine Light is on
• Erratic vehicle behavior
• Communication errors between vehicle systems
• Incompatible software version in one of the control modules
• Faulty or outdated control module
• Wiring issues or poor connections in the CAN bus network
CAN: Controller Area Network, a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other in applications without a host computer.
OBD-II: On-Board Diagnostics II, a standardized system in cars and trucks for self-diagnostics and reporting.
• Use an OBD-II scanner to confirm the P1719 code.
• Inspect the CAN bus wiring and connections for damage or corrosion.
• Check for software updates for the vehicle's control modules.
• Update the software of the affected control module.
• Repair or replace faulty wiring or connectors in the CAN bus network.
• Replace the control module if it is found to be defective.
• OBD-II scanner
• Multimeter
• CAN bus diagnostic tool
$150 - $500
Moderate
• Ford Focus
• Nissan Altima
• Toyota Camry
• Regular software updates for vehicle control modules
• Routine inspection of wiring and connectors
• Avoid aftermarket parts that may not be compatible
Communication Error
• Ensure your vehicle's software is up to date.
• Have your vehicle inspected by a professional if the Check Engine Light comes on.
Check with your vehicle manufacturer for warranty coverage on control module updates or replacements.
The P1719 code has become more common as vehicles incorporate more complex electronic systems that rely on CAN communication.
Moderate – While the vehicle may still operate, unresolved communication errors can lead to more significant issues over time.
Driving with unresolved communication errors can lead to unexpected vehicle behavior, which may pose safety risks.
• Vehicle ignition in ON position
• All control modules powered and communicating
The CAN bus network runs throughout the vehicle, connecting various control modules located in different areas such as the engine bay, dashboard, and trunk.
Q: Can I drive with a P1719 code?
A: It's possible, but not recommended as it may lead to further issues.
Q: How do I know if my car needs a software update?
A: Check with your dealership or service center for the latest updates for your vehicle model.
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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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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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