Ford Focus 1.6 Ti-VCT Catalytic Converter Failure
Ford
Focus
2004
1.6 Ti-VCT Sigma
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely
The catalytic converter on Focus Mk2 1.6 Ti-VCT can fail internally, causing rattling from the substrate breaking up. P0420 stored and rattling noise confirm failure. Replacement costs £150-350.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Ford Focus 2004 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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