2006 Ford Focus (LS) — Repair Solution

2.0L AODB 4cyl 16v DOHC MPFI Petrol · Warning Light / Electrical Malfunction · Electrical

Ford Focus (LS) Warning Light / Electrical Malfunction Electrical Diagnostic Sequence Available

Vehicle Details

Make: Ford
Model: Focus (LS)
Year: 2006
Engine: 2.0L AODB 4cyl 16v DOHC MPFI Petrol
Area: Electrical
Category: Warning Light / Electrical Malfunction

Customer Complaint

This was a Ford Focus Ghia.

Engine light on/ Indicator not showing on dash/ Brake light on.
Water on the floor, drivers’ side.

Problem Summary

A/C water dripping in vehicle, Drivers side.

The water on floor issue was that the drain hose had fallen off the driver's side HVAC box, the water was condensation build-up draining on the floor instead of going inside through the tube.
Re-secured the hose in place and had a look where the water may have gone to damage anything.

Extracted a number of engine codes. Cleared and rescanned.
U1900 - (CAN) communication bus fault .
U1900 that may indicate the instrument cluster issue.

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 2006 Ford Focus (LS) is available to TaT members.

Unlock with Free Trial

Verified Repair Solution

The confirmed repair procedure for this 2006 Ford Focus (LS) is available to TaT members. Includes the verified fix and technician tips.

Unlock with Free Trial

Quick Facts

CodeFORLS06436
Vehicle2006 Ford Focus (LS)
Engine2.0L AODB 4cyl 16v DOHC MPFI Petrol
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