|
My AMM failed without throwing a CEL, but the fuel trim adaptation codes were close to the threshold for throwing a light, so I'm sure it was coming. Loss of power and stumbling at 4000rpm and above is a classic AMM failure symptom. However, before I threw a part at it, we read the adaptations and installed a "known good" AMM and only after confirming the problem did I buy one and install it. Change your engine air filter while you're at it. Keeping your engine air filter fresh will greatly extend the life of your AMM. I got 160,000kms out of my original one by keepign the filter fresh and regularly cleaning the air box.
|