What Does P07A5 Mean?
Transmission friction element B is stuck in the on (engaged) position and will not release when commanded by the TCM. This results in the element remaining applied when it should be released for other gear selections, causing gear bind-up, harsh shifts, driveline shudder, or the sensation of being in two gears at once. This is a serious mechanical condition that requires immediate attention.
Safety Warning
A stuck-on friction element causes simultaneous gear engagement (bind-up), which can cause sudden vehicle deceleration, violent driveline shudder, or complete lockup of the drivetrain. This is extremely dangerous. Do NOT drive the vehicle. Have it towed immediately to a transmission specialist.
Common Causes
30%
Apply piston stuck in engaged position due to swollen seals or debris
25%
Failed or collapsed return springs preventing piston retraction
20%
Valve body exhaust circuit blockage preventing pressure release
15%
Friction discs heat-welded to steel plates from prior severe slip episode
10%
Pressure control solenoid stuck in energized state
Diagnostic Steps
1
Identify the gears where element B should be released and test for bind-up, shudder, or inability to shift in those gears.
2
Check for accompanying solenoid codes that may indicate a hydraulic command problem rather than a mechanical issue.
3
Use bi-directional scan tool control to command the apply solenoid off and monitor for pressure release.
4
If the solenoid deactivates properly but element B remains engaged, the issue is mechanical.
5
Inspect transmission fluid for burnt smell and metallic particles indicating heat damage.
6
The transmission must be removed and disassembled to repair the stuck friction element.
Estimated Repair Cost
$500 - $4,000
Parts + labor, varies by vehicle and location
Transmission friction element B is stuck in the on (engaged) position and will not release when commanded by the TCM. This results in the element remaining applied when it should be released for other gear selections, causing gear bind-up, harsh shifts, driveline shudder, or the sensation of being i...
The most common cause of P07A5 (Transmission Friction Element "B" Stuck On) is: Apply piston stuck in engaged position due to swollen seals or debris
Typical repair costs for P07A5 range from $500 to $4,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A stuck-on friction element causes simultaneous gear engagement (bind-up), which can cause sudden vehicle deceleration, violent driveline shudder, or complete lockup of the drivetrain. This is extremely dangerous. Do NOT drive the vehicle. Have it towed immediately to a transmission specialist.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P07A5 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
