LS XR4040 Code AB09

[MOTractor]

The engine service light came on at the end of a regen last Sunday, the "Error diagnosis code display" on the dash reads "AB09". The manual states that it is: ECU(Barometric pressure sensor) and that "Normal sensor signal level over 0.25V.

I could not find out any info using Google. My local dealer had never heard of it and called LS - they said ECU will be replaced, they have ordered it. It should be in next week.

Anybody ever hear of this error? I was not even aware I had a barometric pressure sensor

I will let you know how it turns out...

 

[MOTractor]

I guess nobody had heard of it...

UPDATE: They have now had 2 tractors display that code. The local dealer (i bought my tractor from them) ordered a new one and it was in hand is less than a week. They swapped ECUs in my driveway Monday afternoon. Excellent service! I swear it runs better now than it ever has, did three hours of bush hogging Tuesday evening.