What causes P1738 on a Honda?

Failed 2nd clutch pressure switch stuck open or closed Open or short in the pressure switch signal wire to the PCM Low 2nd clutch hydraulic pressure from a worn clutch pack Clogged pressure switch oil passage in the valve body

How do I fix P1738 on a Honda?

Use an HDS scan tool to monitor 2nd clutch pressure switch state during the 1-2 shift Test switch continuity with hydraulic pressure applied and released Check the signal wire for opens or shorts between the switch and the PCM Replace the 2nd clutch pressure switch if it fails the state test Clear the DTC and road test to confirm clean 1-2 shifts

P1738 Problem in 2nd Clutch Pressure Switch Circuit

Q: What does P1738 mean on a Honda?

P1738 — Problem in 2nd Clutch Pressure Switch Circuit. Applies to Accord, Odyssey, Civic with automatic transmission.

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

What does P1738 mean on a Honda?

P1738 — Problem in 2nd Clutch Pressure Switch Circuit. This Honda-enhanced code applies to Accord, Odyssey, Civic with automatic transmission.

Common causes of P1738

Failed 2nd clutch pressure switch stuck open or closed
Open or short in the pressure switch signal wire to the PCM
Low 2nd clutch hydraulic pressure from a worn clutch pack
Clogged pressure switch oil passage in the valve body

How to fix P1738

Use an HDS scan tool to monitor 2nd clutch pressure switch state during the 1-2 shift
Test switch continuity with hydraulic pressure applied and released
Check the signal wire for opens or shorts between the switch and the PCM
Replace the 2nd clutch pressure switch if it fails the state test
Clear the DTC and road test to confirm clean 1-2 shifts