Shift solenoid H sticking mechanically due to contamination, varnish or debris in the fluid; Degraded, low or incorrect transmission fluid; Blocked or dirty transmission filter or valve body passages; Wiring or connector fault in the solenoid circuit, such as a short to voltage, chafed loom or corroded terminals; Valve body wear or a sticking valve affecting solenoid H operation; Faulty transmission control module or internal driver fault; Internal clutch or seal wear causing a ratio fault that mimics a stuck solenoid.

P076C

Shift Solenoid H Stuck On.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
7: AreaTransmission
6C: FaultThe specific fault in that area

What it means

P076C is a generic powertrain code meaning the transmission control module has detected that shift solenoid H is stuck on, so it stays energised or keeps applying hydraulic pressure when it has been commanded off. The module saw a gear ratio, pressure switch or clutch slip reading that did not match the commanded solenoid state. Which gears or clutches solenoid H controls depends on the transmission, so check the manufacturer data for the specific unit.

Symptoms

Gearbox warning light or malfunction indicator lamp on
Gearbox stuck in one gear or in limp-home mode
Harsh, delayed or flared gear changes
Missing gears or unable to select certain gears
Engine flare or slipping between shifts
Poor fuel economy or reduced performance

Possible causes

Shift solenoid H sticking mechanically due to contamination, varnish or debris in the fluidlikely
Degraded, low or incorrect transmission fluidlikely
Blocked or dirty transmission filter or valve body passagespossible
Wiring or connector fault in the solenoid circuit, such as a short to voltage, chafed loom or corroded terminalspossible
Valve body wear or a sticking valve affecting solenoid H operationpossible
Faulty transmission control module or internal driver faultrare
Internal clutch or seal wear causing a ratio fault that mimics a stuck solenoidrare

How to diagnose

Read all stored codes and freeze frame data, noting gear, temperature and speed when the fault set, and check for related solenoid or ratio codes
Check the transmission fluid level, condition and smell, following the procedure for that model, as some units are sealed and need specific checks
Inspect the transmission wiring, connector and loom for damage, chafing, water ingress and corrosion
Check battery condition and charging voltage, as low voltage can cause false transmission faults
Using a scan tool, command solenoid H on and off if supported and watch live data for the correct response
Test the solenoid circuit resistance and check for shorts to power or earth against the manufacturer specification
Check for any applicable technical service bulletins or software updates for the transmission control module
Drop the pan and inspect the filter and debris if the fluid is contaminated, then assess the solenoid and valve body

How to fix

Replace the transmission fluid and filter with the specified type if it is dirty or degraded, then clear the code and retest
Repair or replace damaged wiring, connectors or terminals in the solenoid circuit
Replace shift solenoid H if it is stuck or out of specification
Clean, repair or replace the valve body if valves are sticking or worn
Update or repair the transmission control module only if a faulty or outdated calibration is confirmed as the cause
Arrange internal transmission repair if clutch or seal wear is confirmed

Can I keep driving?

Medium severity

The car may be driveable in limp-home mode, but continued use risks further transmission damage, so have it fixed soon. Avoid heavy loads, towing and long journeys, and stop if shifting becomes severely harsh or the gearbox slips.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.