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DTC codes / Honda codes / P1795

P1795 · HondaAutomatic Transmission System Malfunction

P1795 on Honda vehicles means the transmission control module (TCM) has detected a general malfunction within the automatic transmission system, often related to the solenoid pack, wiring, or internal hydraulic pressure. The TCM sets this code when it sees an unexpected signal or performance issue that does not fit a more specific solenoid or sensor code.

SystemPowertrain
Code typeHonda specific
SeverityMedium
Fix difficultyProfessional
AreaTransmission

Symptoms you may notice

  • The check engine light or transmission warning light (D4 or gear indicator) illuminates on the dashboard.
  • The transmission may enter limp mode, holding a single gear or refusing to shift.
  • Harsh or delayed shifts, especially when cold or under load.
  • Slipping between gears or a flare in engine speed during upshifts.
  • Often no symptoms besides the warning light, especially if the fault is intermittent.

Common causes, most likely first

  1. Faulty transmission solenoid pack or individual shift solenoid.
  2. Damaged or corroded wiring harness or connector at the transmission.
  3. Low or contaminated automatic transmission fluid (ATF).
  4. Internal hydraulic pressure loss due to worn seals or valve body issues.
  5. Failing transmission control module (TCM) or poor electrical ground.
  6. Sticking or dirty solenoid screen or filter.

How to diagnose and fix it

  1. Check ATF level and condition; top off or replace fluid if dark or burnt.
  2. Inspect the transmission wiring harness and connectors for damage, corrosion, or loose pins.
  3. Scan the TCM for pending or stored codes and freeze-frame data to identify intermittent faults.
  4. Test the solenoid pack resistance and operation according to Honda service information.
  5. Perform a transmission line pressure test to rule out internal hydraulic problems.
  6. Replace faulty solenoids or the solenoid pack if resistance is out of specification.
  7. Repair or replace damaged wiring or the TCM as a last resort after all other checks pass.

What P1795 Often Misses on Hondas

  • A weak battery or poor ground can cause the TCM to set P1795 intermittently, so always check charging system and grounds before condemning the transmission.
  • Many Honda owners replace the solenoid pack only to find the real issue is a corroded connector at the transmission, so inspect the pins carefully.
  • P1795 can be triggered by a failing transmission range sensor or a misadjusted shift cable, which are often overlooked.
  • After any transmission repair, the TCM may need a relearn procedure or software update to prevent the code from returning.
  • This code does not always mean the transmission is failing; a simple fluid change and connector cleaning can resolve it in some cases.

Can I keep driving with P1795?

You can drive cautiously if the transmission shifts normally and the light is steady, but avoid heavy acceleration or towing. If the transmission is in limp mode or shifting harshly, stop driving and have it diagnosed to prevent further 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 Honda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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