P0751🔧 Transmission / Shift solenoidsStop and fix promptly

P0751: Shift Solenoid A Performance or Stuck Off (Meaning, Causes, Fixes)

Reviewed 2026-10-25 · Based on 2 cited source(s)

What P0751 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 P0751 as a generic code for a performance problem or stuck-off condition in the shift solenoid A circuit, seen by the powertrain control module (PCM), on vehicles including Chrysler, Ford, Dodge, Hyundai, Kia, Ram, Lexus, Toyota, Mazda, Honda and VW. It says most automatic transmissions have at least three shift solenoids (A, B and C), that the A-solenoid codes are P0750 through P0754, and that an overdrive or other transmission warning lamp may also come on. RepairPal defines P0751 as Shift Solenoid "A" Performance/Stuck Off and says the transmission control module (TCM) sets it when it detects that a shift solenoid isn't performing as desired. So the sources name different modules (PCM versus TCM); which one runs the transmission depends on the vehicle. OBD-Codes.com doesn't tie solenoid A to a particular gear and says which codes set depends on the 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 P0751 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, catching in gear and limp mode among the symptoms. If any of those happen, 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. Low transmission fluid level (both sources)
  3. Faulty or damaged wiring, or a corroded or damaged connector (both sources)
  4. Transmission control module failure (RepairPal) or faulty PCM (OBD-Codes.com)
  5. Dirty or contaminated fluid, or a dirty or clogged transmission filter (OBD-Codes.com)
  6. Defective valve body or restricted hydraulic passages (OBD-Codes.com)
  7. Internal transmission failure (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 P0751 and the freeze frame data; other transmission codes, such as B or C solenoid codes or other A-solenoid codes (P0750, P0752, P0753 or P0754), 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 look for contamination; both sources list low fluid as a cause.
  4. Inspect the wiring and connectors to the transmission solenoids, transmission pump and PCM for scraping, rubbing, bare wires, burn spots, corrosion and damaged pins, and check the shift linkage for security and 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, catches in gear or goes into limp mode; RepairPal rates P0751 Urgent
  • OBD-Codes.com says the advanced steps are very vehicle specific and need a digital multimeter and the vehicle's technical references
  • Valve body work, internal transmission repair, or flashing or replacing the PCM or TCM are shop jobs

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 P0751 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, catching in gear and limp mode possible.

Can I drive with P0751?

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, catches in gear or goes into limp mode.

What's the difference between P0751 and P0752?

Both point to shift solenoid A. Both sources call P0751 the performance or stuck-off code, and RepairPal's code list names P0752 the stuck-on code; P0750 is the general shift solenoid A code, P0753 electrical and P0754 intermittent. Both sources list the same causes across these A-solenoid codes, and P0756 is the matching performance or stuck-off code for solenoid B.

Can low transmission fluid cause P0751?

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

Why do the sources disagree?

RepairPal says the TCM sets the code, while OBD-Codes.com says the PCM sees the fault. OBD-Codes.com lists many more causes, including valve body, filter and internal transmission problems, and rates severity as moderate at first rather than Urgent. Neither source gives a repair cost.

Sources

  1. OBD-Codes.com: P0751 Shift Solenoid A Performance / Stuck Off
  2. RepairPal: P0751 Shift Solenoid "A" Performance/Stuck Off (rated Urgent)

Last reviewed 2026-10-25. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.