February 1, 2012
A new automotive application article about a Kia Carens with a mixture problem is available.
A Kia Carens with 1.6 liter engine keeps generating an oxygen sensor related code that the fuel mixture was too rich. Resetting the error and driving the car would set the error code again. Several components were replaced, even the Electronic Control Module (ECM), but the error kept coming back. Diagnosing using a automotive lab scope revealed the cause of the problem.