P2718 - Pressure Control Solenoid 'D' Control Circuit/Open
The P2718 code indicates an open or malfunction in the electrical circuit of the pressure control solenoid 'D', which is part of the transmission's hydraulic control system. This solenoid regulates fluid pressure to the clutch packs and bands for proper gear engagement. An open circuit means the solenoid is not receiving the correct voltage or current, often due to a broken wire, damaged connector, or internal solenoid failure. This can cause erratic shifting, slipping, or transmission overheating.
1. Most Common Causes
- Faulty pressure control solenoid 'D'
- Open or shorted wiring in the solenoid circuit
- Damaged connector or poor electrical connection
- Low transmission fluid level or dirty fluid
- Internal transmission harness damage
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed shifting
- Transmission slipping or overheating
- Reduced fuel economy
- Transmission stuck in a single gear (limp mode)
3. Step-by-Step Diagnosis
Step 1: Scan the vehicle for codes and record freeze frame data.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Visually check the wiring and connector for the pressure control solenoid 'D' for damage, corrosion, or loose pins.
Step 4: Use a multimeter to test the solenoid's resistance (typically 4-6 ohms) and compare to manufacturer specs.
Step 5: Check for voltage and ground at the solenoid connector with the ignition on; if missing, trace the circuit back to the TCM.
Step 6: If all electrical tests pass, replace the pressure control solenoid 'D'.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can cause transmission damage, overheating, or sudden failure. If you must drive, keep speeds low and avoid heavy acceleration.
How much does it cost to fix?▼
The cost to fix P2718 typically ranges from $150 to $400, including parts and labor. The solenoid itself costs $50-$150, and labor adds $100-$250 depending on the vehicle and shop rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.