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Ford Focus 1.6 - Engine Management

elson_cj
elson_cj
in General Ford Related Discussions

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New poster, hoping someone can help a very distressed ford owner!!

The EM light has come on and I have a reader which gives me a couple of codes. One was the coil pack which has since been replaced and has prevented an issue I saw before where the car would Rev by itself.. However, I am getting the following codes:

P0130
P0150
U0001
P2298
P0158

All relate to the Oxygen Sensors(s). I had a lambda sensor replaced in November. But looking especially at P0158 it sounds like the Cat converter has failed....

Any ideas.. Hopefully it'll work but I have attached 5 photos confirming all codes. 

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  • Quote


    • Author

    Could it be that there is a Vacuum Leak? I recall hearing a small hissing sound when the engine is turned off. It would explain why the code reader picks up an issue with the Oxygen sensors....

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    • The Digestive Forum Roundup (24th May - 31st May 2026)

      Steve ·
      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
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