Random lambda problem - solved
Discussion
Thought I'd post this in case anyone else suffers a similar fault.
I had the MIL light randomly flickering, like a bad electrical connection, but only after 3-4 hours of driving. Diagnostics logged a Lambda fault, but I couldn't see anything much wrong with the live data (flicking happily between 0V and 1.somethingV). Plus, I only recently changed that lambda.
A closer look at the data traces showed that the "high" signal on that lambda was 1.6V instead of 1.1/1.2V for the other one. Clearly, when it gets *really* hot, it enough to just nudge it over the 1.7V threshold that the ECU sets for the MIL.
Anyway, new one in, and only a couple of knuckles skinned in the process, and all seems well again - looks like it was just a dodgy part.
I had the MIL light randomly flickering, like a bad electrical connection, but only after 3-4 hours of driving. Diagnostics logged a Lambda fault, but I couldn't see anything much wrong with the live data (flicking happily between 0V and 1.somethingV). Plus, I only recently changed that lambda.
A closer look at the data traces showed that the "high" signal on that lambda was 1.6V instead of 1.1/1.2V for the other one. Clearly, when it gets *really* hot, it enough to just nudge it over the 1.7V threshold that the ECU sets for the MIL.
Anyway, new one in, and only a couple of knuckles skinned in the process, and all seems well again - looks like it was just a dodgy part.
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