P2812 - Pressure Control Solenoid 'G' Control Circuit/Open
The P2812 code indicates that the Powertrain Control Module (PCM) has detected an open or malfunction in the control circuit of the pressure control solenoid 'G'. This solenoid is part of the transmission's hydraulic system, regulating fluid pressure for clutch and band engagement. An open circuit means there is a break in the electrical path, preventing the solenoid from operating correctly, which can lead to harsh shifting, slipping, or transmission damage.
01. Most Common Causes
- Faulty pressure control solenoid 'G'
- Open or shorted wiring in the solenoid circuit
- Corroded or damaged connector at the solenoid or PCM
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping or delayed engagement
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test solenoid resistance with a multimeter (typically 4-6 ohms).
Step 4: Check for power and ground at the solenoid connector with the ignition on.
Step 5: If wiring and solenoid are good, test PCM output and replace PCM if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with an open solenoid circuit can cause harsh shifting, transmission slipping, and potential internal damage, leading to costly repairs.
How much does it cost to fix?▼
Repair costs typically range from $200 to $600, depending on the cause. Replacing a solenoid may cost $150-$400, while wiring repairs are usually $100-$300. PCM replacement can exceed $800.