ChrisfromtheLakes Posted July 12, 2019 Share Posted July 12, 2019 Hi folks, I have just bought my first car....a 2003 Fiesta with 60k on the clock, with 1.25 petrol engine. It was a private sale and within a couple of days the engine management light illuminated. My chum with a diagnostics plug said it was showing 'P0030 H02S Heater Control Circuit B1S1'. I have acquired the Haynes manual for my car and wondered could this be as simple as replacing the oxygen lambda sensor...? Thank you. Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted July 13, 2019 Share Posted July 13, 2019 It could also be a wiring fault, but it most likely is the lambda sensor yes. Quote Link to comment Share on other sites More sharing options...
stef123 Posted July 13, 2019 Share Posted July 13, 2019 Test the sensor, it’s simply a resistance through the heater circuit. Quote Link to comment Share on other sites More sharing options...
ChrisfromtheLakes Posted July 13, 2019 Author Share Posted July 13, 2019 Many thanks...much appreciated. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Ford UK Shop
Sponsored Ad
Name: eBay
Ford Model: FordUK Shop
Ford Year: 2024
Latest Deals
Ford UK Shop for genuine Ford parts & accessoriesDisclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via the club
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.