What causes P1020 on a Honda?

Valve pause system harness open or shorted Poor electrical connection in the valve pause circuit Faulty rocker arm oil pressure switch Faulty rocker arm control solenoid Low engine oil level or low oil pressure

How do I fix P1020 on a Honda?

Confirm the code and check engine oil level and condition first Inspect the valve pause system connectors and harness for damage and corrosion Test the rocker arm oil pressure switch and solenoid circuits Check oil pressure against the factory spec before replacing parts Repair the wiring or replace the failed component Clear the code and retest

P1020 The powertrain control module saw the valve pause system stuck off

Q: What does P1020 mean on a Honda?

P1020. The powertrain control module saw the valve pause system stuck off. Cylinder deactivation may not engage and fuel economy can suffer. Applies to Honda and Acura models that use this code.

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Honda and Acura models that use this code

What does P1020 mean on a Honda?

P1020. The powertrain control module saw the valve pause system stuck off. Cylinder deactivation may not engage and fuel economy can suffer. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of P1020

Valve pause system harness open or shorted
Poor electrical connection in the valve pause circuit
Faulty rocker arm oil pressure switch
Faulty rocker arm control solenoid
Low engine oil level or low oil pressure

How to fix P1020

Confirm the code and check engine oil level and condition first
Inspect the valve pause system connectors and harness for damage and corrosion
Test the rocker arm oil pressure switch and solenoid circuits
Check oil pressure against the factory spec before replacing parts
Repair the wiring or replace the failed component
Clear the code and retest

Sources and review

Last updated 2026-10-10.