01 The Heart of Your Car: How Does the Engine Actually Work? • 02 How to Rebuild a Car Battery (Is It Worth the Effort?) • 03 Choking Up Your Ride? Signs You Need Throttle Body Cleaning • 04 He Paid $900 for a Used Car, Fixed It in Minutes, and Now t… • 05 Why the Automotive Industry Is Changing Faster Than Ever • 06 How to Troubleshoot Car Wiring Problems: A Guide for Begin… • 07 Tips for Extending the Life of Your Automatic Transmission … • 08 P0056 – O2 Heater Circuit Fault (Bank 2 Sensor 2): Diagnosi… • 09 Gearing Up: How Cetane Numbers Boost Your Diesel Engine's P… • 10 Understanding Gear Ratios: How Transmissions Impact Perform… •

DTC codes / Mazda codes / P1752

P1752 · MazdaTransmission Shift Solenoid A Circuit Shorted

P1752 on a Mazda means the transmission control module (TCM) has detected an abnormally low resistance or a direct short to ground on the electrical circuit that operates shift solenoid A. The TCM commands the solenoid to move hydraulic pressure inside the transaxle, and when the current draw exceeds the expected range, it flags the circuit as shorted and may default to a fail-safe shift strategy.

SystemPowertrain
Code typeMazda specific
SeverityMedium
Fix difficultyProfessional
AreaTransmission

Symptoms you may notice

  • The check engine light or automatic transaxle warning light illuminates steadily on the dashboard.
  • Often no symptoms besides the warning light, especially if the short is intermittent and the solenoid still moves.
  • Harsh or delayed shifts, or the transmission sticking in a single gear as the TCM enters limp-home mode.
  • The transmission may refuse to downshift or upshift at normal road speeds, holding a gear too long.
  • A noticeable clunk or jolt when selecting drive or reverse if solenoid A controls line pressure during engagement.
  • In some cases the engine may stall or flare during deceleration if the converter clutch strategy is affected.

Common causes, most likely first

  1. A chafed or pinched solenoid A feed wire shorting to ground against the transaxle case or a bracket.
  2. Transmission fluid contaminating the internal solenoid harness connector, causing a conductive path between pins.
  3. A failed shift solenoid A with an internally shorted coil winding.
  4. Corroded or pushed-back pins at the TCM connector or the internal transaxle pass-through connector.
  5. A shorted solenoid A control wire inside the transaxle harness where it flexes near the valve body.
  6. Less commonly, a faulty TCM driver circuit that falsely reports a short when the solenoid is good.

How to diagnose and fix it

  1. Scan all modules and record freeze-frame data for P1752, then clear the code and test-drive to confirm it returns under the same conditions.
  2. Inspect the external transaxle harness and connectors for chafing, corrosion, or fluid intrusion before removing any covers.
  3. Measure resistance of solenoid A at the TCM connector or pass-through connector and compare to the Mazda service specification for that transaxle.
  4. Check for continuity to ground on the solenoid A control wire with the TCM disconnected; any continuity indicates a short that must be traced.
  5. If the external circuit tests good, remove the transaxle pan and inspect the internal harness and solenoid A connector for fluid contamination or damaged insulation.
  6. Replace the faulty solenoid or repair the shorted wire, then clear codes and verify shift quality through a full warm-up drive cycle.
  7. If the circuit and solenoid test good but the code persists, perform a TCM pin-out and driver test or substitute a known-good TCM before condemning the unit.

What a shorted solenoid code really means

  • A P1752 is set by current draw, not by a simple continuity check, so a solenoid that ohms out correctly can still trigger the code if the TCM driver sees excessive current at operating temperature.
  • Fluid wicking into the internal solenoid connector is a common Mazda-specific cause that mimics a failed solenoid and is missed when only the external harness is inspected.
  • The TCM often commands a default gear when this code sets, so a transmission that feels fine after a key cycle may still be running a fail-safe strategy that hides the real fault.
  • A shorted solenoid A circuit can be caused by a pinched harness at the transaxle mount or a rubbed wire near the battery tray, so always inspect the full routing rather than just the solenoid itself.
  • Do not replace the TCM first; Mazda TCM drivers are robust, and the majority of P1752 cases trace back to the solenoid, its internal harness, or connector contamination.

Can I keep driving with P1752?

You can usually drive the vehicle to a repair shop if the transmission still engages and moves, but avoid heavy acceleration, towing, or long highway trips because the fail-safe strategy can leave you in a single gear. If the transmission slips, flares, or refuses to engage a gear, stop driving and have it towed to prevent internal damage.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for Mazda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage