. I am merely a working-class DIY mechanic who strives to excel!I am approximately a week away from obtaining my ISTA+ software, or perhaps this inquiry would be unnecessary, but I seek some guidance!
I purchased this vehicle in late July, and soon after the acquisition, the check engine light would illuminate after I accelerated aggressively for merely a few seconds. The message displayed on my I drive indicates an engine malfunction. Reduce energy output. Proceeding is acceptable. Proceed to the BMW dealership." I sensed a reduction in power, yet it was not as significant as commonly depicted in descriptions of "limp mode. In truth, it was hardly a reduction.
Following some online investigation (possibly misguided counsel), an individual in a Facebook group suggested adding Chevron Techron High Mileage to a new tank of petrol and then using regular Chevron for the subsequent fill-up. Numerous individuals appeared to concur, thus I proceeded accordingly. It appeared to provide significant assistance; however, the check engine light would still activate if I accelerated rapidly and maintained high velocity for a brief period (approximately a minute, not exceeding 120 mph). Having completed the fuel treatment and currently on my third tank, I accelerated fully today and it activated almost instantly before reaching 80 mph.
I have conducted research both here and elsewhere, gathering various ideas, but I would appreciate the insights of the experts present!
Please be advised that I exclusively utilise 91 octane ethanol-free petrol. I am uncertain regarding its fuel history.