What causes P1751 on a Honda?

Sticking shift solenoid valve B from varnish or clutch debris Contaminated transmission fluid restricting valve body passages Worn A/T clutch pressure control solenoids A and B Internal hydraulic leak in the clutch circuit

How do I fix P1751 on a Honda?

Inspect transmission fluid condition and change if degraded Follow the Honda solenoid replacement criteria bulletin to separate solenoid faults from internal failure Test shift solenoid B operation with an HDS scan tool Replace the solenoid set if commanded but hydraulically unresponsive Clear codes and verify shifts through every gear on a road test

P1751 Mechanical Problem in Hydraulic Control System of Shift Solenoid Valve B

Q: What does P1751 mean on a Honda?

P1751. Mechanical Problem in Hydraulic Control System of Shift Solenoid Valve B. Applies to Accord, Odyssey, Pilot with automatic transmission.

Category: Powertrain - Transmission
Severity: Check Engine Light
Applies to: Accord, Odyssey, Pilot with automatic transmission

What does P1751 mean on a Honda?

P1751. Mechanical Problem in Hydraulic Control System of Shift Solenoid Valve B. This Honda-enhanced code applies to Accord, Odyssey, Pilot with automatic transmission.

Common causes of P1751

Sticking shift solenoid valve B from varnish or clutch debris
Contaminated transmission fluid restricting valve body passages
Worn A/T clutch pressure control solenoids A and B
Internal hydraulic leak in the clutch circuit

How to fix P1751

Inspect transmission fluid condition and change if degraded
Follow the Honda solenoid replacement criteria bulletin to separate solenoid faults from internal failure
Test shift solenoid B operation with an HDS scan tool
Replace the solenoid set if commanded but hydraulically unresponsive
Clear codes and verify shifts through every gear on a road test

Sources and review

Last updated 2026-09-24.