The P2718: Pressure Control Solenoid ‘D’ Control Circuit/Open code indicates that the Transmission Control Module (TCM) has detected an open circuit in the pressure control solenoid ‘D’ control circuit. This could be due to disconnected wiring, an open circuit, a faulty solenoid, or a damaged connector. This open circuit will prevent the solenoid from functioning properly, leading to issues with hydraulic pressure control and potentially causing erratic transmission shifting.
P2718 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2718: Pressure Control Solenoid ‘D’ Control Circuit/Open |
| Is it serious? | Yes, an open circuit can prevent the solenoid from operating, causing improper hydraulic pressure control, which may lead to shifting problems and transmission damage. |
| Possible causes | – Open circuit or disconnected wiring in pressure control solenoid ‘D’ – Faulty solenoid or connector – Control module issues |
| How to diagnose? | – Inspect and test pressure control solenoid ‘D’ control circuit – Check for open circuits and disconnected wiring – Verify solenoid and connector integrity – Replace damaged components as needed |
P2718 Meaning
The P2718: Pressure Control Solenoid ‘D’ Control Circuit/Open code is set when the TCM detects that the circuit controlling pressure control solenoid ‘D’ is open, meaning there is a disconnection or break in the electrical path. This issue can prevent the solenoid from receiving the necessary power to control hydraulic pressure in the transmission, potentially resulting in shifting issues or failure to engage/disengage gears properly. Common causes include disconnected or damaged wiring, a faulty connector, or a defective solenoid.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to determine if there are additional codes. Other codes could help identify whether the problem extends beyond solenoid ‘D’ or if there are related issues in the transmission system. | OBD-II Scanner |
| Inspect Solenoid ‘D’ Control Circuit | Locate pressure control solenoid ‘D’ and visually inspect the control circuit. Look for visible signs of damage, such as broken or frayed wires, loose connections, or any open connectors that could indicate an open circuit. | Flashlight, Safety Gloves |
| Check Wiring and Connectors for Continuity | Use a multimeter to check continuity in the wiring leading to solenoid ‘D’. Ensure that there is a complete circuit from the TCM to the solenoid, and look for any breaks or disconnections that could create an open circuit. | Multimeter |
| Inspect Solenoid Connector | Inspect the connector for solenoid ‘D’. Check for corrosion, broken pins, or poor connection integrity. Ensure that the connector is firmly seated and that the terminals make good contact. | Flashlight, Mechanic Tools |
| Test Voltage at Solenoid ‘D’ | With the ignition turned on, use a multimeter to verify that power is reaching pressure control solenoid ‘D’. Measure voltage at the connector to ensure it matches the manufacturer’s specified range. No voltage indicates an open or disconnected circuit. | Multimeter |
| Perform TCM Output Test | Use a diagnostic scanner to verify that the TCM is sending output commands to solenoid ‘D’. If the TCM does not send the correct command, it could indicate a malfunction in the module itself. | Diagnostic Scanner |
| Check for Physical Damage | Inspect the solenoid for any physical damage that might prevent it from operating correctly. A cracked housing or other visible issues could suggest the solenoid itself is faulty and requires replacement. | Flashlight |
| Replace Faulty Components | Replace any damaged or disconnected components found during the inspection, such as wiring, connectors, or solenoid ‘D’ itself. Ensure the replacement components are in accordance with manufacturer specifications. | Replacement Parts |
| Secure and Protect Wiring | Ensure all wiring is secured properly and away from moving parts or high heat sources. Use zip ties to secure the wiring and prevent any further damage that could result in an open circuit. | Mechanic Tools, Zip Ties |
| Clear the Code and Test System | After repairs, use an OBD-II scanner to clear the P2718 code. Perform a test drive to verify that pressure control solenoid ‘D’ is functioning correctly and that the transmission is operating smoothly. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle to ensure that the P2718 code has not returned and that the transmission system, including solenoid ‘D’, is functioning correctly without any open circuit issues. | OBD-II Scanner |
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