Low, degraded or contaminated transmission fluid, or the wrong fluid type; Shift solenoid G sticking due to debris or varnish in the valve body; Damaged wiring or poor connector contact to solenoid G or the internal transmission harness; Blocked transmission filter or restricted fluid passages reducing hydraulic pressure; Worn valve body, internal leakage or worn clutch or seal components; Faulty transmission control module or outdated software where a known issue exists for the model.

P075B

Shift Solenoid G Performance/Stuck Off.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
7: AreaTransmission
5B: FaultThe specific fault in that area

What it means

P075B is a generic powertrain code meaning the transmission control module has detected that Shift Solenoid G is not performing as commanded and appears to be stuck off. The module compared the commanded gear or pressure state with the actual result, such as gear ratio, input and output speed correlation or pressure switch feedback, and saw no response when the solenoid should have been active. Which gears or functions solenoid G controls depends on the transmission, so check the manufacturer's information for the specific model.

Symptoms

Gearbox warning light or malfunction indicator lamp on
Gearbox stuck in one gear or in limp-home mode
Harsh, delayed or flared shifts
Missing a gear or unable to select certain gears
Engine revving high without matching acceleration
Poor fuel economy

Possible causes

Low, degraded or contaminated transmission fluid, or the wrong fluid typelikely
Shift solenoid G sticking due to debris or varnish in the valve bodylikely
Damaged wiring or poor connector contact to solenoid G or the internal transmission harnesspossible
Blocked transmission filter or restricted fluid passages reducing hydraulic pressurepossible
Worn valve body, internal leakage or worn clutch or seal componentspossible
Faulty transmission control module or outdated software where a known issue exists for the modelrare

How to diagnose

Read all stored codes and freeze frame data, noting gear, speed, fluid temperature and load when the fault set
Check for other transmission, speed sensor or engine codes that may point to a related cause
Check transmission fluid level, condition and type against the manufacturer's specification, looking for debris, burnt smell or metallic particles
Inspect the wiring and connectors to the transmission for damage, corrosion, chafing or fluid ingress
Measure solenoid G resistance and check its supply and control circuits against the model's specification
Use live data to command the solenoid and compare the commanded state with actual gear ratio and pressure readings
Check the manufacturer's service information for known faults or software updates relating to this code on the specific transmission
Drop the pan and inspect the filter and debris, then test the valve body if the electrical checks pass

How to fix

Correct the fluid level or replace the fluid and filter with the specified type
Repair or replace damaged wiring, terminals or the internal harness connector
Clean or replace shift solenoid G, or the solenoid pack, as the transmission design requires
Overhaul or replace the valve body if worn or sticking
Repair internal transmission wear or leakage if pressure tests confirm it
Update the control module software only where an outdated calibration is a known cause, or replace the module if confirmed faulty

Can I keep driving?

Medium severity

The car may be driveable, but limp mode or stuck gears can make it unpredictable, and continued driving risks further internal transmission damage. Have it diagnosed soon and avoid heavy loads or towing meanwhile.

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