P0796: Pressure Control Solenoid C Performance or Stuck Off
The P0796 code indicates that the Powertrain Control Module (PCM) has detected a malfunction in the pressure control solenoid 'C' circuit. This solenoid regulates hydraulic pressure to the transmission clutches and bands. When it is stuck off or performing incorrectly, the transmission may not shift properly, leading to harsh shifts, slipping, or failure to engage gears. This can be caused by electrical issues, low fluid, or internal transmission problems.
01. Most Common Causes
- Low or dirty transmission fluid
- Faulty pressure control solenoid 'C'
- Wiring or connector issues in the solenoid circuit
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed shifts
- Transmission slipping or stuck in gear
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and check freeze frame data to confirm P0796.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Test the pressure control solenoid 'C' resistance and compare to specs; replace if out of range.
Step 4: Check wiring and connectors for damage, corrosion, or loose connections; repair as needed.
Step 5: If all else is fine, perform a transmission pressure test to identify internal issues.
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 it can cause further transmission damage. You may experience harsh shifting or slipping, which could lead to a breakdown.
How much does it cost to fix?▼
The cost varies from $150 to $400 for solenoid replacement, but if internal transmission damage is found, repairs can exceed $1,500.