P0135 and P2251 Fault Codes in Skoda Fabia 2010 1.2 TSI: Causes and Solutions
I recently encountered fault codes P0135 and P2251 on my 2010 Skoda Fabia 1.2 TSI model. I initially assumed it was a sensor issue and replaced the oxygen sensor, but the problem persisted. The codes remain active even after replacement. What other potential causes could be responsible for these fault codes if not a faulty sensor itself?