P0750 Code: Honda Accord (2018-2023) - Causes, Symptoms & Fixes

No recalls found in NHTSA database
No owner complaints found for this exact make/model/year/issue combination in the provided data.

Important data caveat: This guide uses general automotive knowledge for the technical explanations and the best-practice diagnostic approach. The provided data indicates no NHTSA complaints or recalls specific to P0750 on 2018–2023 Honda Accord, so the guidance below focuses on typical P0750 diagnostics and common-repair options rather than manufacturer-flagged service bulletins.

CODE MEANING AND SEVERITY

• Code: P0750
• Name: Shift Solenoid A Malfunction (Shift Solenoid A circuit fault)
• What it means: The vehicle’s transmission control module (TCM) monitors the electrical circuit for Shift Solenoid A. If it detects an abnormal signal (wrong resistance, open/short circuit, or improper actuation), it sets P0750.
• Severity and drivability:
  • Often causes incorrect or delayed upshifts/downshifts, harsh shifting, or stay-in-torque/limp-like behavior.
  • In some cases the transmission may shift normally at times and throw the code intermittently.
  • Repeated P0750 can lead to reduced fuel economy, driver frustration, and potential transmission damage if the underlying issue is not addressed.
• Notes:
  • P0750 is part of the shift-solenoid family (P0750–P077x range in many vehicles). It specifically points to Solenoid A, but many symptoms and repairs overlap with other solenoid codes (B/C) or valve-body issues.
  • The dataset provided shows no recalls or complaints for this exact case, so treat P0750 as a fault that can be caused by electrical, hydraulic, or mechanical transmission issues rather than assuming a single cause.

COMMON CAUSES ON HONDA ACCORD (2018–2023)

• Faulty Shift Solenoid A (electrical issue or internal failure)
• Wiring harness problems to the solenoid A or its connector (pin damage, corrosion, loose/dirty connectors)
• Poor or dirty transmission fluid level/condition (low fluid, old or contaminated fluid)
• Valve body or solenoid housing contamination or sticking (sludge, debris)
• Transmission control module (TCM) or PCM software needing an update or recalibration
• Ground/Power supply issues to the solenoid circuit (corrosion at battery/ground points, poor battery voltage)
• Internal transmission wear or mechanical binding (valve body wear, worn seals)
• Fault in the solenoid power supply path (fused circuit, relay)
• In some cases, related shift-solenoid codes (P0751, P0752, etc.) can accompany P0750 if multiple solenoids are affected

SYMPTOMS TO WATCH FOR

• Erratic or harsh shifting between gears, especially around 1st–3rd or 3rd–4th gears
• Delayed or failed upshifts or downshifts; transmission may hunt for a gear
• Transmission may enter a failsafe/limp mode (often Lock in a limiting gear) and illuminate the MIL/Check Engine Light
• Slipping out of gear or staying in one gear, especially under load
• Harsh or clunky shifts, or shuddering during shifts
• Possible DTCs in conjunction with P0750 (e.g., P0751, P0752, P0753, or P0770–P0776 family) and/or transmission fluid/service notices
• No obvious external leaks; the issue is primarily electrical/hydraulic in the valve body/solenoid area

DIAGNOSTIC STEPS (systematic approach)

Note: Always start with the basics and build a picture from there. Document findings and clear codes only after repair to verify.

A. Prepare and verify

• Use a quality OBD-II scanner to confirm P0750 is current (not history) and check for related codes (P0751, P0752, P0753, P077x, or solenoid-related codes).
• Note freeze-frame data: gear requests, vehicle speed, RPM, engine load, transmission fluid temps, and any prior fault codes.

B. Visual and electrical inspections

• Inspect transmission fluid level and condition (color, odor, contamination). Low or burnt/termite-dyed fluid can indicate transmission woes beyond a single solenoid.
• Inspect electrical connectors to the shift solenoid A:
  • Disconnect and inspect the harness connector for corrosion, bent pins, and secure seating.
  • Check for damaged insulation, pin looseness, or moisture intrusion.
• Inspect grounds and battery connections; ensure good voltage supply to the TCM and solenoid circuits.
• Check for any other related codes that might indicate broader transmission electronics issues.

C. Electrical tests (solenoid circuit)

• With the ignition on (engine off), perform a resistance check on the Shift Solenoid A coil if access is possible per service manual:
  • Compare measured resistance to the OEM specification.
  • If resistance is out of spec or infinite (open) or very low (short), the solenoid is suspect.
• Test continuity from the solenoid connector back to the TCM/ECU pin to rule out a broken wire.
• Inspect for shorts to power or ground in the solenoid circuit using a multimeter or appropriate scan-mode data live view.
• If the vehicle supports in-scan test or actuator test for the shift solenoids, perform an actuator test to see if the solenoid responds correctly to commanded signals.
• Verify battery voltage and alternator charging condition; undersupply can cause solenoids to behave erratically.

D. Fluid and mechanical checks

• If fluid is old or degraded, consider a transmission fluid service (drain/replace) with the correct Honda-spec fluid. Some Honda transmissions require specific fluid types (DEXRON VI or Honda specific ATF); follow the owner’s manual or service manual.
• If the fluid is new and the code persists, plan for deeper transmission service (solenoid replacement, valve-body cleaning/rebuild, or more extensive repairs).

E. Advanced or follow-up testing (as needed)

• If the solenoid coil resistance and wiring tests pass but P0750 persists, the issue may be inside the valve body or a software issue in the TCM/PCM. Consider:
  • Valve-body service or solenoid replacement (often requires removal of the transmission pan and valve body).
  • Transmission fluid temperature sensor and pressure sensor checks if applicable.
  • TCM/ECU software update or reflash (with factory scan tool).
• In cases where you cannot isolate the fault to the solenoid or wiring, a valve-body inspection or replacement may become necessary.

F. Confirm repair

• After any repair or component replacement, clear the codes and perform a road test to confirm that shifts are smooth and P0750 does not reappear. Monitor live data to verify the solenoid A circuit is functioning as commanded.

RELATED CODES

• Shift Solenoid A/B/C malfunction family: P0750, P0751, P0752, P0753, etc. (The exact mapping of A, B, C varies by transmission and year.)
• Other transmission-related codes that may appear with P0750: P0770–P0776 family (depending on the vehicle and fault persistence).
• Sometimes P0740 (Torque Converter Clutch Circuit) or P0741 (TC Stall Speed/Stuck) can appear if the transmission is having broader hydraulic issues.
• Always check for a cluster of codes, as a single solenoid fault can be accompanied by other circuit or mechanical faults.

REPAIR OPTIONS AND COSTS (2025 PRICES, U.S. ballpark)

Note: Prices vary by region, shop, transmission variant, and whether you use OEM parts, aftermarket parts, or refurbished components. The ranges below assume a typical metropolitan area with standard labor rates.

A. Shift Solenoid A replacement (solenoid only)

• Parts: $80–$250
• Labor: 1–2 hours
• Typical total: $200–$550
• What you get: Replacement of Shift Solenoid A; sometimes includes a gasket or seal kit if the pan is removed.

B. Shift solenoid pack or valve-body service (if multiple solenoids or valve-body issues)

• Parts: $150–$800 (solenoid pack or valve-body kit; if a full valve body rebuild is required, parts can be higher)
• Labor: 2–5 hours
• Typical total: $500–$1,800
• What you get: Rebuild or replacement of the solenoid assembly or valve-body components; may include cleaning of passages and seals.

C. Transmission fluid service (drain and fill, synthetic/ Honda-spec)

• Parts: $20–$50 for fluid; $5–$25 for filters (if included)
• Labor: 0.5–1.5 hours
• Typical total: $130–$350
• Note: Some Honda transmissions require specific fluid types; ensure you use the correct spec.

D. Transmission fluid flush and filter change (optional, more thorough)

• Parts: $50–$100 (fluid and filter)
• Labor: 1.5–2.5 hours
• Typical total: $200–$500

E. Transmission replacement (new/rebuilt or remanufactured)

• Parts: $2,500–$5,500 (remanufactured or new transmission)
• Labor: 6–12 hours (varies with model and access)
• Typical total: $3,000–$7,000+
• Notes:
  • Many Accord owners replace with a remanufactured unit; costs vary by shop and whether the unit is used or rebuilt.
  • If a full replacement is required, expect a multi-day job in many shops.

F. Miscellaneous

• Seals/gaskets, pan gasket, mounting hardware: $20–$200
• Software update/TCM recalibration (if needed): $80–$200 (plus time for software download)
• Diagnostic fees: $80–$150 (waived if you proceed with repair at the same shop in many areas)

DIY VS PROFESSIONAL

• DIY viability:
  • Easy wins: Fluid level/condition check, basic electrical inspection of visible connectors, and possibly a fluid service if you’re comfortable with transmission drain/fill.
  • More challenging: Accessing Shift Solenoid A directly, testing coil resistance, removing the transmission pan, inspecting/cleaning valve-body passages, and replacing solenoids or valve-body assemblies. On a 2018–2023 Accord with a modern 10-speed automatic, many repairs involve pan removal and valve-body work or software updates. This typically requires specialized tools and knowledge.
• Pros of professional service:
  • Correct diagnosis with proper OEM specs; reliable solenoid/valve-body testing; proper replacement with torque specs.
  • Correct fluid type and complete transmission service; reduced risk of creating internal damage.
  • Proper TCM/software reflash or calibration when needed.
• When to DIY:
  • If you have strong auto trans experience, the right tools, and a reliable shop manual. Ensure you have a safe working environment and can properly support the vehicle and drain fluids.
• Safety considerations:
  • Transmissions contain hot oil and moving parts; always follow proper jacking/hoisting safety and dispose of old fluid properly.

PREVENTION

• Regular maintenance:
  • Follow Honda’s recommended transmission fluid service interval and use the correct Honda-spec ATF.
  • Check fluid level and condition at regular service intervals; address leaks promptly.
• Fluid quality and change interval:
  • Avoid mixing different fluids; use the correct type and viscosity.
  • If the vehicle is approaching the upper range of service intervals, consider a proactive fluid service to reduce sludge and varnish build-up in valve bodies.
• Driving habits:
  • Avoid aggressive shifting and frequent towing (if not designed for it) which can accelerate solenoid wear.
  • Allow the transmission to warm up in cold weather before heavy driving to reduce wear.
• Electrical health:
  • Maintain the battery and charging system; voltage dips can affect solenoid operation and TCM performance.
• Software health:
  • Keep TCM/ECU software up to date via authorized updates when available.

Final notes

• The provided data indicates no recalls or complaints for this exact code/model/year combination in the NHTSA database. Therefore, the diagnostic and repair suggestions above are based on general automotive knowledge and typical repair practices for P0750-related issues, rather than manufacturer-issued notices.
• If you’re troubleshooting this on a 2018–2023 Honda Accord, expect to verify electrical circuits first, then fluid condition, and then consider valve-body or solenoid components if wiring checks are clean. In many cases the problem is electrical or hydraulic in the valve body, but mechanical wear within the transmission is also a possibility if the code recurs after a solenoid replacement.
• When in doubt, consult a qualified transmission technician with access to Honda service information and a professional scan tool to ensure correct diagnosis and to avoid unnecessary parts replacement.