Rudy7831 Posted January 15 Share Posted January 15 Hello, I am experiencing a persistent issue with misfiring and cylinder deactivation and would much appreciate any assistance. The vehicle operates efficiently until I speed substantially, such as when merging onto a highway. The vehicle exhibits misfiring; I see a "pulse" (or two), the EPC light activates (steady), and the Engine Light illuminates (flashing). The automobile begins to operate poorly. Upon pulling over, turning off the ignition, and restarting the vehicle, both the EPC and engine warning lights illuminate, however the engine light ceases to blink. When I turn off the ignition and open and close the driver's door before restarting, the EPC light turns off, but the engine light remains on (not flashing). VCDS diagnostics reveal two engine faults: a misfire in Cylinder 5 and Cylinder Deactivation. Upon erasing the trouble codes, the vehicle operates normally till I accelerate moderately once again. I have provided two VCD scan files. The first file (A) is immediately subsequent to my deliberate instigation of the problems. The second file (B) was recorded after I turned off the ignition and opened and closed my door prior to resuming. The scans indicate that Cylinder Disabling transitions from "Not Confirmed" to "Intermittent Confirmed." Does anybody have any recommendations? Your feedback would be highly valued. Quote Link to comment Share on other sites More sharing options...
allmightyASTON Posted January 15 Share Posted January 15 I am not an expert, but you have several error codes, not only the misfire codes. Have you ever cleaned them? Concerning the misfire, I would interchange the coil packs between the two cylinders and see whether the error shifts. If not, proceed to do the same procedure with the spark plugs. The most prevalent causes of misfits, and my first focus. Quote Link to comment Share on other sites More sharing options...
Rudy7831 Posted January 15 Author Share Posted January 15 alternative codes - I have many codes to address. The predominant issues linked to the stereo system stem from a technician who "repaired" the original equipment manufacturer Bang & Olufsen amplifier by severing the harness and manually connecting a small Bose unit as a substitute after failing to recode a new OEM amplifier. It was a two-year ordeal. Certain codes remain enigmatic to me, since the components seem to function well (the fuel door and central locking operate perfectly despite displaying codes). Initially, I considered plugs or coils; however, I began to doubt this reasoning since everything seemed to "reset" when turning off the ignition. It is reassuring to know that you share the same initial sentiments. Quote Link to comment Share on other sites More sharing options...
allmightyASTON Posted January 15 Share Posted January 15 I had a similar misfire in my vehicle and identified the issue as the coil pack by following the aforementioned steps. Replaced the coil pack, and the issue is likely resolved. Quote Link to comment Share on other sites More sharing options...
Rudy7831 Posted January 15 Author Share Posted January 15 Thank you one again. I will proceed with it and replace the plugs concurrently. Quote Link to comment Share on other sites More sharing options...
Rudy7831 Posted January 15 Author Share Posted January 15 🤪 Quote Link to comment Share on other sites More sharing options...
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