The P06DA00 diagnostic trouble code (DTC) on a Mercedes C300 can be a source of confusion and concern. This code pertains to the engine oil pump and often appears alongside other issues, such as the P052E PCV code. A personal experience with this code involved a visit to an independent mechanic for PCV code verification, where the P06DA00 was unexpectedly discovered. While a standard OBD2 scanner didn’t detect it initially, the dealer confirmed the code and quoted a hefty repair cost exceeding $1500.
Online research revealed a forum discussion and an Xentry bulletin suggesting the code might be ignored, particularly for M274 engines. Although the vehicle in question had an M133 engine, a calculated risk was taken to defer the repair due to the already substantial cost of the PCV fix. For over 18 months and 20,000 miles, the car operated without any noticeable drivability problems, warning lights, or performance issues, even under demanding conditions like autocross events. The P06DA00 code remained undetected without a proper scan prompted by the PCV issue.
Understanding the technical details, if the component associated with P06DA00 fails, it likely “fails open,” potentially leading to excessive lubrication rather than a lack thereof. Experiencing electrical issues alongside this code seems unusual based on this firsthand account. This information is based on personal experience and should not be considered professional mechanical advice. Consult a qualified technician for diagnosis and repair of any DTCs.
