P2730 - Pressure Control Solenoid 'G' Control Circuit High
The Powertrain Control Module (PCM) has detected a high voltage condition in the control circuit of the pressure control solenoid 'G'. This solenoid is typically part of the transmission valve body and regulates hydraulic pressure for clutch or band application. A high voltage reading indicates a short to power, open circuit, or faulty solenoid, which can cause erratic shifting or transmission slippage.
1. Most Common Causes
- Faulty pressure control solenoid 'G'
- Short to power in the solenoid control circuit
- Open or high resistance in the wiring or connector
- Damaged PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed shifting
- Transmission slipping or stuck in gear
- Reduced fuel economy
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the wiring and connector for damage, corrosion, or loose pins.
Step 3: Test the solenoid resistance with a multimeter (typically 4-6 ohms).
Step 4: Check for voltage at the solenoid connector with key on (should be battery voltage).
Step 5: If wiring and solenoid are good, test PCM output or replace PCM.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a high voltage solenoid circuit can cause transmission damage or unsafe shifting. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs range from $150 to $400, depending on whether the solenoid, wiring, or PCM needs replacement. Labor and parts vary by vehicle.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.