From the manual
P1885(34-1)(2)Blinks ON CVT input shaft (drive pulley) speedsensor
(see DTC P1885: PROBLEM IN CVT INPUT SHAFT(DRIVE PULLEY) SPEED
SENSOR CIRCUIT )
I would think that this code with noise could be something bad. did the magnet on the drain plug have an unusual amount of metal on it?
On further reading the TS is for a sensor circuity only not a mechanical issue. Follow the manual steps good luck
Manual can be found:
Download 2000-2006 Insight Service Manual PDF and Others