P0753
Shift Solenoid A Electrical.
- Generic
- Powertrain
- Generic code
- Medium severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 7
- AreaTransmission
- 53
- FaultThe specific fault in that area
What it means
P0753 is the generic code for an electrical fault in the shift solenoid 'A' circuit of an automatic transmission. The transmission control unit commands the solenoid on and off and monitors the circuit. It set the code because the voltage or current did not match what it expected, which points to an open circuit, a short or a failed solenoid coil. Which gear changes solenoid A controls depends on the transmission.
Symptoms
- Gearbox stuck in one gear or in a limp-home mode
- Harsh, delayed or missed gear changes
- Wrong gear selected, for example starting off in a higher gear
- Gearbox warning light or malfunction indicator lamp on
- Poor acceleration or higher fuel consumption
- Torque converter lock-up not working
Possible causes
- Faulty shift solenoid A (open or shorted coil)likely
- Damaged, chafed or corroded wiring between the solenoid and the transmission control unitlikely
- Poor connection or corrosion at the transmission internal harness connector or the control unit pluglikely
- Contaminated, degraded or low transmission fluid affecting the solenoid and wiringpossible
- Fault in the transmission control unit driver circuitrare
- Low battery voltage or poor earth or power supply to the transmission control unitpossible
How to diagnose
- Read all stored and pending codes and the freeze frame data, noting any other transmission or battery voltage codes
- Check the transmission fluid level, condition and smell, following the manufacturer's procedure for your model
- Test battery condition and charging voltage, and check the control unit power and earth connections
- Inspect the transmission external connector and wiring for chafing, heat damage, water ingress and corrosion
- Measure the solenoid A resistance at the connector and compare it with the manufacturer's specification for your transmission
- Check the wiring between the solenoid and the control unit for continuity, short to earth and short to supply
- Command the solenoid with a suitable scan tool active test, if supported, and watch the response
- Check for any technical service bulletins or software updates for your model before condemning the control unit
How to fix
- Repair or replace damaged wiring and clean or replace faulty connectors
- Replace the shift solenoid A or the solenoid pack, as the design of your transmission requires
- Replace the internal transmission harness if it is faulty
- Correct the fluid level or service the transmission with the specified fluid if it is degraded
- Repair battery, power or earth faults found at the control unit
- Repair or replace the transmission control unit only after the wiring and solenoid are proved good
Can I keep driving?
Medium severity
The car can usually be driven carefully a short distance, but the gearbox may be in limp-home mode with limited gears. Continued driving risks further transmission damage, so have it checked soon.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.