P0750🔧 Transmission / Shift solenoidsStop and fix promptly

P0750: Shift Solenoid A Malfunction (Meaning, Causes, Fixes)

Reviewed 2026-10-23 · Based on 2 cited source(s)

What P0750 means

Automatic transmissions shift by sending fluid pressure to the right clutches and bands at the right time, and the shift solenoids open and close valves in the valve body to do that. OBD-Codes.com (John Ingalls, former service manager and Air Force mechanic) describes P0750 as a generic code for a general malfunction in the shift solenoid A circuit detected by the powertrain control module (PCM); related A-solenoid codes are P0751 through P0754, and an overdrive or other transmission warning lamp may also come on. RepairPal names it Shift Solenoid "A" and gives two descriptions: its summary says the transmission control module (TCM) sets P0750 when it detects that a shift solenoid is not performing as desired, while its details say the PCM sets it when it doesn't see the expected RPM change during the 1st-to-2nd gear shift. RepairPal says shift solenoid A is what enables the 1-2 shift; OBD-Codes.com doesn't tie solenoid A to a particular gear and says the codes set vary by vehicle, transmission and number of gears, so check your vehicle's service information for what solenoid A controls.

Severity: can I keep driving?

Stop and fix promptly

Get it checked soon, and don't keep driving hard on it. RepairPal rates P0750 Urgent, meaning it can cause severe damage or be unsafe. OBD-Codes.com says the severity normally starts as moderate but can become severe rapidly if it isn't fixed, and lists transmission slipping, overheating and limp mode among the symptoms. If the transmission slips, overheats, gets stuck in one gear or drops into limp mode, limit driving and have it diagnosed. An open code can also fail an OBD2 emissions inspection.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. Faulty shift solenoid (both sources)
  2. Corroded or damaged connector, or faulty or damaged wiring (both sources)
  3. Defective transmission valve body (both sources)
  4. Dirty or contaminated transmission fluid restricting the hydraulic passages (both sources)
  5. Low transmission fluid level (OBD-Codes.com)
  6. Dirty or clogged transmission filter (OBD-Codes.com)
  7. Internal transmission failure (OBD-Codes.com)
  8. Faulty PCM (OBD-Codes.com)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Write down every code stored with P0750 and the freeze frame data; other transmission codes help narrow the problem.
  2. Look up technical service bulletins for your year, model and transmission, and check when the fluid and filter were last changed, as OBD-Codes.com recommends.
  3. Check the transmission fluid level and condition. RepairPal says to look at whether it is dirty, brown and burnt or a clear cranberry color.
  4. Inspect the wiring and connectors to the transmission solenoids and the PCM for scraping, bare wires, burn spots, corrosion and damaged pins, and check the shift linkage for binding where your transmission has one (OBD-Codes.com).
  5. With power removed, OBD-Codes.com says wiring continuity should read 0 ohms unless your service data says otherwise; resistance or no continuity points to an open or shorted wire. Voltage specs vary by vehicle, so follow your vehicle's troubleshooting chart.

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • The transmission slips, overheats, sticks in a gear or goes into limp mode; RepairPal rates P0750 Urgent
  • Confirming the fault needs a scan tool test drive: RepairPal describes watching whether the computer commands the 1-2 shift at about 15 to 35 mph and whether the transmission actually shifts
  • RepairPal notes P0750 can set even when the solenoid tests electrically within spec but isn't working correctly
  • RepairPal warns P0750 is commonly misdiagnosed as an engine misfire or a driveline problem

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Is P0750 serious?

Yes, it should be fixed soon. RepairPal rates it Urgent. OBD-Codes.com says it usually starts as moderate but can become severe rapidly if not corrected, with slipping, overheating and limp mode possible.

Can I drive with P0750?

Neither source gives a safe distance. Because RepairPal rates it Urgent and OBD-Codes.com says it can worsen quickly, keep driving to a minimum and stop if the transmission slips, overheats or goes into limp mode.

What does shift solenoid A do?

RepairPal says solenoid A enables the shift from 1st to 2nd gear. OBD-Codes.com says solenoid lettering and the codes set vary by vehicle, transmission and number of gears, so check your vehicle's service information.

Can low or dirty transmission fluid cause P0750?

Both sources list dirty fluid restricting the hydraulic passages, and OBD-Codes.com also lists low fluid and a clogged filter, so checking the fluid is a sensible first step.

Why do the sources disagree?

RepairPal's summary says the TCM sets the code when a shift solenoid isn't performing as desired, while its details say the PCM sets it when it doesn't see the expected RPM change on the 1-2 shift. OBD-Codes.com describes a general malfunction in the solenoid A circuit seen by the PCM and doesn't tie it to one gear. OBD-Codes.com also lists more causes, including low fluid, a clogged filter, internal transmission failure and the PCM, and rates severity as moderate at first rather than Urgent.

Sources

  1. OBD-Codes.com: P0750 Shift Solenoid A Malfunction
  2. RepairPal: P0750 Shift Solenoid "A" (rated Urgent)

Last reviewed 2026-10-23. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.