Regarding Subaru vehicles, the code P1718 signals a problem within the AT CAN communication circuit. This code is associated with a CAN communication error, an abbreviation for Controller Area Network. CAN communication is used to relay information between the various control units in a vehicle, and when this communication is disrupted, the vehicle’s performance is adversely affected. The cause of the P1718 code is typically related to an open or shorted CAN communication, an ECM or ABS/VDCCM CAN communication error, or a LAN system error. To ensure that your Subaru runs properly, you must take the appropriate steps to identify and solve the underlying cause of the P1718 code.
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Causes and Solutions for Subaru Code P1718
| Cause | Solution |
|---|---|
| CAN communication is open or shorted | Check for any damaged wiring or loose connections and fix them as necessary. |
| ECM, ABS/VDCCM CAN communication error | Replace the faulty ECM or ABS/VDCCM. |
| LAN system error | Check the LAN system connection and repair any damaged wires or connectors. |
| Faulty CAN communication module | Replace the CAN communication module. |
Open or Shorted CAN Communication
When the CAN communication is open or shorted, it can disrupt communication between the various control units in the vehicle. This could cause issues like the car not starting properly or the engine running rough. To diagnose this issue, inspecting all of the wiring and connections in the CAN communication circuit is necessary. Any wiring must be repaired or replaced if it is damaged or loose.
ECM or ABS/VDCCM CAN Communication Error
When the ECM or ABS/VDCCM experiences a CAN communication error, it can cause the vehicle to run improperly. This could mean that the car does not start or experiences poor performance. To fix this issue, it is necessary to replace the faulty ECM or ABS/VDCCM.
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LAN System Error
The LAN system is also essential for proper CAN communication. The vehicle may run poorly if there is a problem within the system. To diagnose this issue, inspecting the LAN system connection is necessary. If there are any damaged wires or connectors, they must be repaired or replaced.
Faulty CAN Communication Module
The CAN communication module relays information between the various control units. If faulty, it can cause issues such as the vehicle not starting or running roughly. To fix this issue, it is necessary to replace the CAN communication module.
Conclusion
If your Subaru displays the code P1718, there is likely an issue with the CAN communication circuit. To ensure that your vehicle runs properly, it is necessary to identify and solve the underlying cause of the code. This could include inspecting and repairing damaged wiring and connections, replacing the faulty ECM or ABS/VDCCM, or replacing the CAN communication module. Taking the appropriate steps to resolve the Subaru Code P1718 issue can help restore your Subaru to optimal performance.
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