2004 Subaru Forester (SG) — Repair Solution

2.5L EJ251 4cyl 16v SOHC MPFI Petrol Manual · Erratic Idling / Idling problem · Engine

Subaru Forester (SG) Erratic Idling / Idling problem Engine Diagnostic Sequence Available

Vehicle Details

Make: Subaru
Model: Forester (SG)
Year: 2004
Engine: 2.5L EJ251 4cyl 16v SOHC MPFI Petrol Manual
Area: Engine
Category: Erratic Idling / Idling problem

Customer Complaint

Revs hanging on gearshifts or going higher sometimes 2500 or 3000 rpm. Does come down when you stop car but stays at around 1500 rpm.

Problem Summary

Intermittent problem, if it is not playing up I do notice revs come down in steps as your pulling up and wont fully return until car stops rolling.

Diagnostic Sequence

The step-by-step diagnostic process used to identify this fault is available to TaT members.

Unlock with Free Trial

Fault Description

The detailed fault description and root cause analysis for this 2004 Subaru Forester (SG) is available to TaT members.

Unlock with Free Trial

Verified Repair Solution

The confirmed repair procedure for this 2004 Subaru Forester (SG) is available to TaT members. Includes the verified fix and technician tips.

Unlock with Free Trial

Quick Facts

CodeSUBSG04117
Vehicle2004 Subaru Forester (SG)
Engine2.5L EJ251 4cyl 16v SOHC MPFI Petrol Manual
ComplaintVisible
Diag. SequenceMembers Only
SolutionMembers Only

Need the Full Fix?

Get the complete diagnostic sequence, verified solution, and technician tips.

Access the Full Repair Solutions Database

Unlock 6,127 verified repair solutions with complete diagnostic details, confirmed fixes, and technician tips.


© 2026 The Automotive Technician (TaT) — www.tat.net.au