P1718
Automatic Transmission CAN Communication Circuit
P1718 is an OBD-II diagnostic trouble code meaning: Automatic Transmission CAN Communication Circuit. Common causes: open or short circuit in the can bus, damage to the automatic transmission wiring harness. Estimated repair cost: $6–56.
Symptoms
- Incorrect gear shifting
- The gearbox goes into emergency mode
- Check Engine light comes on
- Reduced vehicle dynamics
- Possible jerking when changing gears
Causes
- Open or short circuit in the CAN bus
- Damage to the automatic transmission wiring harness
- Malfunction of the automatic transmission control unit
- Problems with CAN bus power supply
- Corrosion of contacts in connectors
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect the connectors and contacts of the automatic transmission control unit
- Check the CAN bus supply voltage
- Scan other modules for communication errors
- If necessary, replace damaged wires or connectors
Related codes
Error P1718 by Vehicle Brand
FAQ
What does the P1718 code mean?
P1718 is an OBD-II diagnostic trouble code that indicates: Automatic Transmission CAN Communication Circuit
What causes a P1718 error code?
The most common causes of P1718 include: Open or short circuit in the CAN bus; Damage to the automatic transmission wiring harness; Malfunction of the automatic transmission control unit; Problems with CAN bus power supply.
How do I fix a P1718 diagnostic trouble code?
To fix P1718: Check the integrity of the CAN bus wiring. Inspect the connectors and contacts of the automatic transmission control unit. Check the CAN bus supply voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1718?
Limited driving only, diagnose soon
How much does it cost to fix P1718?
The estimated repair cost for P1718 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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