What Does P07B1 Mean?
Transmission friction element "H" is stuck in the applied (on) position and will not release when the TCM commands disengagement. This creates continuous engagement of a clutch pack or band that should cycle on and off during normal shift sequences. The result is potential gear bind-up, where conflicting torque paths are established simultaneously through the transmission. This produces harsh shifts, drivetrain vibration, abnormal deceleration, or complete inability to complete certain shift transitions.
Safety Warning
Do not drive. Gear bind-up from a stuck-on friction element can cause sudden drivetrain lockup or severe transmission failure. This presents an immediate safety hazard at any speed. Tow the vehicle to a repair facility.
Common Causes
30%
Element H clutch piston seized in applied position from seal degradation, scoring, or contamination
25%
Valve body blockage or stuck valve preventing hydraulic pressure exhaust from element H
20%
Control solenoid stuck in apply state due to electrical short or mechanical seizure
15%
Clutch plates heat-welded from excessive temperature causing permanent bond
10%
Broken or collapsed return spring preventing piston retraction after release command
Diagnostic Steps
1
Review freeze frame and monitor real-time gear ratios to confirm element H remains engaged during gears where it should be released.
2
Monitor transmission fluid temperature trend — continuous application of an element creates excess heat from parasitic drag.
3
Run scan tool solenoid output tests to verify the element H control solenoid can be properly de-energized and confirm wiring integrity.
4
Test element H servo circuit apply and release pressures to verify the hydraulic system allows proper pressure exhaust.
5
Internal transmission inspection is required if external diagnostics are normal — evaluate piston, return springs, and clutch plate condition.
Estimated Repair Cost
$2,000 - $5,000
Parts + labor, varies by vehicle and location
Transmission friction element "H" is stuck in the applied (on) position and will not release when the TCM commands disengagement. This creates continuous engagement of a clutch pack or band that should cycle on and off during normal shift sequences. The result is potential gear bind-up, where confli...
The most common cause of P07B1 (Transmission Friction Element "H" Stuck On) is: Element H clutch piston seized in applied position from seal degradation, scoring, or contamination
Typical repair costs for P07B1 range from $2,000 to $5,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Do not drive. Gear bind-up from a stuck-on friction element can cause sudden drivetrain lockup or severe transmission failure. This presents an immediate safety hazard at any speed. Tow the vehicle to a repair facility.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P07B1 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
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