P1718 Code - Automatic Transmission CAN Communication Circuit
Quick Answer
The P1718 code indicates a problem with the Automatic Transmission CAN Communication Circuit. Common causes include Damaged wiring or connectors in the CAN communication circuit, Faulty transmission control module, Issues with other control modules in the CAN network. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1718 indicates Automatic Transmission CAN Communication Circuit.
- Common causes
- Common causes include Damaged wiring or connectors in the CAN communication circuit, Faulty transmission control module, Issues with other control modules in the CAN network.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1718 Description
The P1718 code indicates a problem with the Automatic Transmission CAN Communication Circuit. This communication circuit is responsible for transmitting data between various control modules in the vehicle, including the transmission control module, engine control module, and other related components. When this communication circuit fails or malfunctions, it can lead to issues with the transmission's operation and overall vehicle performance.
Common Causes of P1718
- Damaged wiring or connectors in the CAN communication circuit
- Faulty transmission control module
- Issues with other control modules in the CAN network
- Software glitches or programming errors in the control modules
- Electrical interference or voltage fluctuations affecting the communication circuit
Symptoms of P1718
- Erratic shifting or difficulty shifting gears
- Delayed engagement when shifting from park to drive or reverse
- Harsh or rough shifting
- Transmission slipping or overheating
- Dashboard warning lights illuminated (check engine light, transmission warning light)
How to Fix P1718
- Perform a thorough inspection of the CAN communication circuit, including wiring and connectors, to identify any damage or corrosion.
- Use a diagnostic scan tool to retrieve fault codes and check for communication errors between control modules.
- Test the transmission control module and other related components for proper function and communication.
- Repair or replace any damaged wiring, connectors, or control modules as needed.
- Clear the fault codes from the vehicle's memory and test drive the vehicle to ensure proper operation of the transmission.
Cost to Fix P1718
The typical repair costs for addressing the P1718 code can range from $200 to $600, depending on the specific cause of the communication failure and the parts and labor required for the repair. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple shops to compare prices. Additional costs may also be incurred if other components need to be replaced or reprogrammed as part of the repair process.
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Code P1718 Information for Specific Makes
- P1718 Chrysler — EEPROM Integrity Failure
- P1718 Dodge — EEPROM Integrity Failure
- P1718 Ford — Transmission Fluid Temperature Sensor Performance
- P1718 Hyundai — Steering Sensor Low Input
- P1718 Jeep — EEPROM Integrity Failure
- P1718 Lincoln — Transmission Fluid Temperature Sensor Performance
- P1718 Mazda — Transmission Fluid Temperature Sensor Performance
- P1718 Mercury — Transmission Fluid Temperature Sensor Performance
- P1718 RAM — EEPROM Integrity Failure
- P1718 Subaru — Automatic Transmission CAN Communication Circuit
Frequently Asked Questions about P1718 Code
1. What does the OBDII code P1718 mean?
P1718 indicates a problem in the Automatic Transmission CAN Communication Circuit, meaning the transmission control module (TCM) is having trouble communicating with other modules on the CAN (Controller Area Network) bus.
2. What are common symptoms of a P1718 code?
Symptoms may include harsh or delayed shifting, the transmission stuck in a single gear (limp mode), decreased fuel efficiency, and the check engine light or transmission warning light illuminated.
3. What causes the P1718 code to appear?
Common causes include damaged or corroded wiring or connectors in the CAN communication circuit, a faulty transmission control module (TCM), or issues with the CAN bus itself, such as a short or open circuit.
4. How is the P1718 code diagnosed?
A mechanic will typically use a scan tool to check for related codes, inspect the wiring and connectors for damage, and test the communication signals on the CAN bus to identify faults.
5. Can I still drive my car with a P1718 code?
Driving with a P1718 code may be possible, but it is not recommended. Transmission issues can worsen over time and potentially lead to expensive repairs or leave you stranded.
6. How do you fix a P1718 code?
Repairs may include replacing damaged wiring or connectors, repairing or replacing the transmission control module (TCM), or addressing faults in the CAN bus communication circuit.
7. How much does it cost to repair a P1718 code?
The cost varies but can range from $150 to $1,000 or more depending on whether the issue is a simple wiring repair or requires replacing the TCM.
8. Can a weak battery cause the P1718 code?
Yes, a weak or failing battery can cause communication issues on the CAN bus, potentially triggering the P1718 code.
9. Is the P1718 code specific to certain vehicles?
While the P1718 code is common across many manufacturers, its exact definition and troubleshooting steps may vary depending on the vehicle make and model.
10. Can I clear the P1718 code without addressing the problem?
Clearing the code without fixing the root cause will only temporarily turn off the warning light. The code is likely to return until the issue is resolved.
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