P2807: Pressure Control Solenoid 'B' Stuck On
The P2807 code indicates that the Transmission Control Module (TCM) has detected that the pressure control solenoid 'B' is stuck in the 'on' position. This solenoid regulates hydraulic pressure to the transmission clutches and bands. When stuck on, it can cause harsh shifting, delayed engagement, or transmission slippage. The issue is often due to electrical faults, contaminated transmission fluid, or mechanical failure within the solenoid.
01. Most Common Causes
- Faulty pressure control solenoid 'B'
- Dirty or contaminated transmission fluid
- Wiring or connector issues in the solenoid circuit
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Delayed gear engagement
- Transmission slipping or overheating
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect transmission fluid level and condition; replace if dirty.
Step 3: Test solenoid resistance and power/ground circuits with a multimeter.
Step 4: Perform a transmission pressure test to verify solenoid operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a stuck solenoid can cause transmission damage, overheating, or sudden failure. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts (solenoid, fluid, filter) and labor. If internal transmission damage is found, costs can exceed $1,500.