F-series

F23A4

F23A4 SOHC VTEC (ULEV)

Displacement

2.3L (2254 cc)

Configuration

Inline-4

Power

148 hp (110 kW)

Torque

204 N⋅m

Bore × Stroke

86.0 mm x 97.0 mm

Valvetrain

SOHC VTEC 16-valve

Aspiration

Naturally aspirated

Fuel System

PGM-FI (32-bit ECU with wideband AFR sensor)

OBD

OBD2

Years

1998-2002

Factory Fitment

Accord (ULEV models)

Notes

ULEV-certified variant with slightly reduced output and revised intake/exhaust manifolds versus the F23A1.

Swaps using the F23A4

Guides mentioning the F23A4

Difficult 1-2 days

Civic Type R 5-Lug Brake and Suspension Conversion for the 1996-2000 Civic (EK)

Easy 15-30 minutes

Honda PGM-FI Fault Code Reading and ECU Reset (OBD0/OBD1/OBD2)

Expert 6-10 hours (excluding paint and parts lead time)

Honda Fit (GE8) JDM 11-Pin Folding, Heated Door Mirror Retrofit

Difficult 6-10 hours

Honda Prelude (4th Gen) Projector Headlight Retrofit

Difficult 4-6 hours

Honda Fit (GE8) LED Taillight and Rear Fog Light Retrofit

Difficult 3-4 hours

Honda Fit (GE8) HomeLink and Ambient Light Retrofit Using an Acura TSX Overhead Console

Moderate 4-6 hours (plus sealant cure time)

DIY Amber City Lights in Honda Headlight Housings

Difficult 3-5 hours

Diagnosing Dead ECT, CMP and Wideband O2 Signals After a K-Series Conversion Harness Swap