P0752

Code

Generic P — Powertrain

Shift Solenoid A Stuck On

Brand: Generic

Type: P — Powertrain

Views: UK: 20 EN: 35 RU: 41

AI status

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Page language: EN

Causes

Short to ground or short to battery in shift solenoid A wiring
Failed or internally shorted shift solenoid A
Stuck valve or debris in the valve body holding the solenoid valve engaged
Low, dirty, or incorrect transmission fluid
Corroded/loose connector or poor pin contact at the solenoid or PCM/TCM
Faulty PCM/TCM driver circuit

Symptoms

Check Engine / MIL illuminated
Harsh, delayed or no upshift/downshift; incorrect gear engagement
Transmission stuck in one gear or limp-in (reduced) mode
Unexpected or continuous shift solenoid activation when monitored with a scan tool
Transmission fluid leak or burnt/contaminated fluid smell (if severe)

What to check

Read and record freeze frame and all transmission-related codes with a scan tool
Check transmission fluid level and condition; look for contamination or metallic debris
Visually inspect wiring harness and connector for damage, corrosion, pinch points, or rodent chewing
Backprobe the solenoid connector and measure resistance and voltage with respect to manufacturer specs
Use a scan tool to command Shift Solenoid A ON/OFF and observe response and DTC behavior
Inspect valve body and solenoid mounting for leaks or foreign debris if accessible

Signal parameters

Typical solenoid coil resistance (varies by vehicle): commonly ~5–30 ohms; consult vehicle spec
When commanded ON: driver supplies ground or +12V (depending on design) with PWM modulation; current typically hundreds of milliamps
When commanded OFF: circuit should be open or at battery voltage (no current flow) — no continuous ground
If stuck ON electrically: circuit measures near 0 ohms to ground or shows constant current when OFF
Scan tool live data: commanded state vs actual solenoid state should match; a 'stuck on' shows active state even when commanded OFF

Diagnostic algorithm

Safely connect a scan tool and confirm P0752 and any related codes; note freeze-frame data (gear, RPM, vehicle speed, transmission temp).
Check transmission fluid level and condition; correct fluid level and change if severely contaminated before further testing.
Visually inspect the solenoid harness and connector for corrosion, damage, or poor fit. Repair any obvious harness damage.
With ignition ON (engine OFF), backprobe the solenoid connector. Measure coil resistance between solenoid pins; compare to spec. A very low resistance may indicate internal short.
With a multimeter, check for unintended continuity to ground or battery (short to ground or short to B+) in the solenoid circuit. Wiggle harness while monitoring for intermittent faults.
Use the scan tool to command the solenoid OFF and ON while monitoring circuit voltage/current at the connector. If the solenoid remains energized when commanded OFF, the fault is likely wiring/PCM or solenoid stuck mechanically.
If wiring and connector are good and solenoid electrical tests fail, remove and bench-test the solenoid (or swap with an identical known-good solenoid if available) to confirm solenoid condition.
If the replaced/bench-tested solenoid is good but the issue persists, inspect and clean the valve body and solenoid bores for debris or stuck spools; repair or rebuild valve body as needed.
If wiring, solenoid and valve body check good, consider PCM/TCM driver circuit diagnosis. Do not replace PCM unless properly bench-tested or confirmed by manufacturer procedures.
Clear the codes, perform a road test and re-scan to verify the repair. Document any intermittent behavior and recheck after test drive.

Likely causes

Damaged or shorted wiring/connector to shift solenoid A
Failed solenoid (electrical short or internal mechanical stuck-on)
Contaminated transmission fluid causing valve sticking
Valve body debris or sticking spool valve
PCM/TCM output driver failure (less common)

Fault status

⚠️ Status

MIL ON; Trouble Code P0752 stored. Freeze frame may include gear commanded/actual, vehicle speed, engine RPM and transmission temperature. Transmission may enter limp mode or exhibit harsh/incorrect shifting.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0 - 3.0 hours

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