P0968: Pressure Control Solenoid 'C' Control Circuit/Open
The P0968 code indicates that the Powertrain Control Module (PCM) has detected an open or malfunction in the electrical circuit controlling the pressure control solenoid 'C'. This solenoid regulates hydraulic pressure within the automatic transmission to facilitate proper gear shifting. An open circuit means there is a break in the wiring, connector, or solenoid coil, preventing the solenoid from operating correctly. This can lead to erratic shifting, transmission slippage, or harsh engagement.
01. Most Common Causes
- Open or shorted wiring in the solenoid circuit
- Faulty pressure control solenoid 'C'
- Corroded or damaged connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slippage
- Delayed engagement
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 5-20 ohms).
Step 4: Check for voltage and ground at the solenoid connector with the ignition on.
Step 5: If wiring and solenoid are good, test PCM output or replace PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the transmission may shift erratically or slip, potentially causing internal damage.
How much does it cost to fix?▼
Repair costs typically range from $200 to $600, including parts and labor, depending on the cause and vehicle.