Shift Solenoid A sticking due to contamination, varnish or debris in the valve body; Low, degraded or contaminated transmission fluid; Faulty Shift Solenoid A (internal electrical or mechanical failure); Damaged wiring, chafed loom or corroded connector between the solenoid and the transmission control module; Valve body wear, stuck valve or internal hydraulic fault; Faulty transmission control module or outdated software, where a known issue exists for that model.

P0752

Shift Solenoid A 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
52: FaultThe specific fault in that area

What it means

P0752 means the transmission control module has detected that Shift Solenoid A is stuck on, or is not following the commanded state. The module saw a gear ratio or shift behaviour that does not match what it commanded, which points to the solenoid or the hydraulic circuit it controls being stuck in the energised position. The exact solenoid layout and gear affected depend on the transmission model.

Symptoms

Harsh, delayed or flared gear changes
Transmission stuck in one gear (limp mode)
Gearbox warning light or malfunction indicator lamp on
Poor acceleration or engine revving without matching drive
Reduced fuel economy
Unable to select certain gears or no upshift or downshift

Possible causes

Shift Solenoid A sticking due to contamination, varnish or debris in the valve bodylikely
Low, degraded or contaminated transmission fluidlikely
Faulty Shift Solenoid A (internal electrical or mechanical failure)likely
Damaged wiring, chafed loom or corroded connector between the solenoid and the transmission control modulepossible
Valve body wear, stuck valve or internal hydraulic faultpossible
Faulty transmission control module or outdated software, where a known issue exists for that modelrare

How to diagnose

Read all stored and pending codes and note freeze frame data such as speed, gear, fluid temperature and load when the fault set
Check the transmission fluid level, condition and smell, following the manufacturer's procedure for that gearbox as some are sealed or need a set temperature
Inspect the wiring loom and transmission connector for chafing, fluid ingress, corrosion and bent or loose pins
Check the battery condition and charging voltage, as low voltage can cause solenoid and shift faults
Measure the Shift Solenoid A resistance and compare with the manufacturer specification for that model
Use a scan tool to command the solenoid on and off and watch the live gear state and ratio to see if it responds
Check for related codes or technical service bulletins for the specific transmission and any available software updates
Inspect the valve body and solenoid for debris or sticking if electrical checks pass, following the model-specific procedure

How to fix

Top up or replace the transmission fluid and filter with the specified type if it is low or contaminated
Repair or replace damaged wiring and clean or replace corroded connectors
Replace Shift Solenoid A if it fails electrical or functional tests
Clean, repair or replace the valve body if it is worn or contaminated
Update the transmission control module software only where an outdated calibration is a known cause for that model, or replace the module if it is confirmed faulty

Can I keep driving?

Medium severity

The car can usually be driven carefully a short distance, but it may sit in limp mode and further use risks clutch and gearbox 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.