Transmission · Powertrain · generic (SAE-defined)
P0750: Shift Solenoid "A"
P0750 means the transmission computer has detected a general malfunction with shift solenoid A, one of the electrically operated valves that route fluid to select gears.
Standard title per SAE J2012 / ISO 15031-6 · Updated 2026-11-07 · By CarWhere Research
How P0750 sets
The powertrain or transmission control module (PCM/TCM) switches shift solenoids on and off in set combinations to select each gear. It monitors each solenoid circuit and sets P0750 when solenoid A's electrical behavior does not match the commanded state. Which physical solenoid is called A, and which gears it controls, differ by manufacturer and transmission.
Common causes of P0750
Roughly most likely first; the actual cause depends on the vehicle and needs testing to confirm.
- Failed shift solenoid A
- Damaged wiring or connector in the solenoid circuit
- Low or contaminated transmission fluid
- Faulty internal transmission harness
- Blown fuse or loss of solenoid power feed
- PCM/TCM fault (less common)
P0750 symptoms
- Check engine light on
- Transmission stuck in one gear or limp mode
- Erratic or missed shifts
- Harsh engagement
- Reduced fuel economy
How P0750 is diagnosed
- Check fluid level and condition.
- Scan for all codes and record freeze frame data.
- Look up which solenoid is A and which gears it affects for the specific transmission.
- Inspect the transmission connector and external harness.
- Measure solenoid A resistance and check the circuit for opens and shorts.
- Command the solenoid with a bidirectional scan tool and listen or monitor for response.
Typical fixes for P0750
- Repair the wiring or connector
- Replace shift solenoid A or the solenoid pack
- Replace the internal harness
- Service the transmission fluid and filter
- Repair or replace the PCM/TCM if confirmed faulty
Replace parts only after testing confirms the cause — a code names the circuit or condition that failed a check, not necessarily the faulty part. We don’t publish per-repair prices; for what households actually spend on upkeep, see car repair costs.
Manufacturer notes
Shift solenoid lettering and gear assignments are manufacturer-specific; check factory service information before testing or replacing parts.
Related codes & warning lights
P0750 FAQ
What does code P0750 mean?
P0750 means the transmission computer has detected a general malfunction with shift solenoid A, one of the electrically operated valves that route fluid to select gears. The standard definition is "Shift Solenoid "A"."
Can I drive with a P0750 code?
Not for long. The transmission may skip gears, stay in one gear, or enter limp mode, and forcing it to keep working this way can lead to clutch damage.
Which gears does shift solenoid A control?
It depends on the transmission. Some designs use solenoid A for the 1-2 shift, others for different gear combinations, so check factory service information for the exact vehicle.
Can I replace just one shift solenoid?
On many transmissions individual solenoids are serviceable, while others use an integrated solenoid pack or valve body assembly that must be replaced as a unit.
Keep researching
More transmission codes
Sources
- SAE J2012 — Diagnostic Trouble Code Definitions (standard code titles)
- ISO 15031-6 — Road vehicles: communication between vehicle and external equipment for emissions-related diagnostics, Part 6: Diagnostic trouble code definitions
- U.S. EPA — Vehicle Emissions Inspection and Maintenance (I/M) programs
- U.S. EPA, 40 CFR 86.1806-17 — Federal onboard diagnostics requirements for light-duty vehicles
General information written by CarWhere Research, not a diagnosis of your vehicle. Manufacturers can add their own sub-definitions and test conditions; confirm with the factory service information for your year, make and model. Before paying for a repair, check NHTSA for open recalls and your warranty booklet: federal law requires an emissions warranty on major emission-control parts such as the catalytic converter and engine computer.