Low or degraded transmission fluid preventing proper hydraulic pressure to the element; Sticking or failed solenoid that controls fluid to friction element H; Worn or burnt clutch plates or brake band for element H; Internal hydraulic leak in the valve body or circuit feeding the element; Faulty transmission control module or damaged wiring to the solenoid; Contaminated fluid blocking a small hydraulic passage; Mechanical binding in the element's apply piston or return spring

DTC codes / P07xx · Transmission / P07B0

P07B0Transmission Friction Element H Performance/Stuck Off

Q: What does code P07B0 mean?

Transmission Friction Element H Performance/Stuck Off. P07B0 indicates that the transmission control module has detected a performance problem with friction element H, meaning the clutch or brake pack is not holding or releasing as commanded. The computer monitors engine speed versus expected turbine speed during a specific shift or engagement and flags the element as stuck off when the expected ratio change does not occur.

P07B0 indicates that the transmission control module has detected a performance problem with friction element H, meaning the clutch or brake pack is not holding or releasing as commanded. The computer monitors engine speed versus expected turbine speed during a specific shift or engagement and flags the element as stuck off when the expected ratio change does not occur.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaTransmission

Symptoms you may notice

Illuminated check engine light or transmission warning light, often with no other noticeable symptoms
Harsh or delayed engagement when shifting into drive or reverse
Slipping during a specific gear change, with engine rpm flaring above normal
Failure to enter a particular gear or a default to limp mode
Shudder or vibration during the affected shift
Poor fuel economy or elevated transmission temperature on long drives

Common causes, most likely first

Low or degraded transmission fluid preventing proper hydraulic pressure to the element
Sticking or failed solenoid that controls fluid to friction element H
Worn or burnt clutch plates or brake band for element H
Internal hydraulic leak in the valve body or circuit feeding the element
Faulty transmission control module or damaged wiring to the solenoid
Contaminated fluid blocking a small hydraulic passage
Mechanical binding in the element's apply piston or return spring

How to diagnose and fix it

Check transmission fluid level and condition; top off or replace if dark or burnt
Scan all modules for related codes and freeze-frame data to confirm the fault conditions
Perform a road test with a scan tool recording commanded gear, engine speed, and turbine speed to verify the slip
Test the solenoid and wiring circuit for element H with a multimeter and bidirectional scan tool
Inspect the valve body and solenoid pack for debris or sticking valves, cleaning or replacing as needed
Perform a transmission pressure test to check hydraulic pressure at the element H circuit
If hydraulic and electrical checks pass, remove the transmission for internal inspection of the clutch pack or band

What the code does not always mean

A P07B0 can be set by a simple low-fluid condition that causes a momentary pressure drop, so always verify fluid level and condition before condemning internal parts.
The code often appears after a fluid change where the wrong fluid type was used, altering friction characteristics and causing the element to slip.
In some vehicles, a faulty turbine speed sensor or engine speed sensor can mimic a friction element fault by feeding incorrect ratio data to the control module.
A sticking accumulator piston or a worn valve body bore can cause delayed apply of element H without any electrical fault, leading to misdiagnosis of the solenoid.
The code may be stored intermittently and only set during a specific driving condition such as a cold start or a hard acceleration, so a thorough road test with live data is essential.

Can I keep driving with P07B0?

Driving with P07B0 risks further damage to the transmission because the slipping element generates excessive heat and debris. Limit driving to a short distance to a repair shop, avoiding heavy acceleration or towing, and do not continue driving if the transmission enters limp mode.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.