P0750 on a 2017 Honda Civic

What does P0750 mean on a 2017 Honda Civic?

P0750 is set when the TCM detects that shift solenoid A is not responding to commands — either the circuit is electrically open or shorted, or the solenoid is mechanically stuck. Shift solenoid A controls one of the hydraulic shift paths inside the valve body; depending on the transmission, "A" may control specific shifts (1-2 or 2-3) or be paired with another solenoid for upshift logic. Without a working solenoid A, the transmission cannot make those shifts and typically enters limp mode.

Symptoms on a 2017 Honda Civic

• Check Engine Light is illuminated
• Transmission stuck in a single gear or limited gear range
• Hard, harsh, or absent upshifts
• Possible no movement in drive (if solenoid is critical to initial gear engagement)
• Engine RPM unusually high at cruise (no upshift completing)
• Reduced fuel economy
• Often paired with P0700 (transmission control malfunction)

Likely causes on a 2017 Honda Civic

1. Failed shift solenoid A (electrical or mechanical) Most common
   Estimated repair: $250– $900
2. Damaged solenoid wiring or external transmission connector Common
   Estimated repair: $100– $500
3. Contaminated transmission fluid causing valve sticking Common
   Estimated repair: $150– $500
4. Worn or stuck valve body causing the solenoid to lose pressure regulation Occasional
   Estimated repair: $600– $2,000
5. Failed TCM driver for the solenoid circuit Rare
   Estimated repair: $500– $1,500
6. Internal transmission damage (rare for P0750 alone) Rare
   Estimated repair: $2,500– $6,500

How to diagnose this on a 2017 Honda Civic

1. Check fluid level and condition

   Always start a transmission diagnosis with fluid. Most modern transmissions require a specific procedure to check level — typically warm, level surface, engine running, selector in park. Burnt-smelling or dark fluid means clutch material in circulation; fix the underlying issue, not just the solenoid.

   Tools: Vehicle-specific service procedure, Replacement fluid if needed

2. Pull all transmission codes from the TCM

   P0750 alone is one repair scope. P0750 with P0731-P0734 (ratio incorrect) or P0741 (TCC stuck off) means broader transmission issues that may not resolve with a solenoid replacement alone.

   Tools: Scan tool with TCM access

3. Test shift solenoid A electrically

   Disconnect the external transmission connector. Find the solenoid A pin in the wiring diagram and measure resistance — typically 10–30 Ω. Infinite or near-zero means a failed solenoid. Confirm the TCM is commanding voltage during a shift attempt by back-probing while driving.

   Tools: Multimeter, Wiring diagram, Back-probe pins

4. Inspect the connector for fluid contamination

   A failing case seal allows transmission fluid to wick up the external wiring harness, contaminating the connector. Look for fluid inside the connector or up the harness. If found, repair the seal AND likely replace the contaminated harness section — fluid in the connector creates intermittent faults that can mimic solenoid failure.

   Tools: Connector unlock tool, Flashlight

5. Drop the pan and inspect for clutch material

   Brown or gritty paste on the pan magnet indicates clutch slippage somewhere in the transmission. If the solenoid is bad, that's one repair; if the pan also shows clutch material, the transmission has bigger problems and a solenoid replacement is just a stopgap.

   Tools: Drain pan, New filter and gasket, Common hand tools

Common fixes

• Replace shift solenoid A (often available as part of a solenoid pack)
• Repair the transmission external connector or harness
• Service transmission fluid and filter
• Replace the valve body for stuck valve issues
• Full transmission rebuild for internal damage

About the 2015-2019 Honda Civic

The 2015-2019 Honda Civic was commonly sold with the following powertrains: 2.0L I4, 1.5L Turbo I4, 1.8L I4. Common trims include LX, Sport, EX, Touring.

Related diagnostic codes

• P0751
• P0752
• P0753
• P0754
• P0755
• P0756
• P0700
• P0700