What causes P1873 on a Honda?

Failed PH-PL control solenoid Open or short in solenoid harness Poor connection at solenoid plug Low CVT fluid level Failed transmission control module

How do I fix P1873 on a Honda?

Check CVT fluid level first Inspect solenoid connector and wiring Test solenoid resistance against spec Check TCM connector for corrosion Replace the solenoid if circuit tests pass

P1873 Problem in PH-PL control solenoid circuit

Q: What does P1873 mean on a Honda?

P1873. Problem in PH-PL control solenoid circuit. Line pressure control loses feedback. Applies to 1996 to 2000 Civic HX with M4VA CVT.

Category: Powertrain - Transmission
Severity: Check Engine Light
Applies to: 1996 to 2000 Civic HX with M4VA CVT

What does P1873 mean on a Honda?

P1873. Problem in PH-PL control solenoid circuit. Line pressure control loses feedback. This Honda-enhanced code applies to 1996 to 2000 Civic HX with M4VA CVT.

Common causes of P1873

Failed PH-PL control solenoid
Open or short in solenoid harness
Poor connection at solenoid plug
Low CVT fluid level
Failed transmission control module

How to fix P1873

Check CVT fluid level first
Inspect solenoid connector and wiring
Test solenoid resistance against spec
Check TCM connector for corrosion
Replace the solenoid if circuit tests pass

Sources and review

Last updated 2026-09-25.