Mercruiser 4.5L Fault Code 942-6
 

Hi all, my Bayliner VR5 with Mercruiser 4.5L 200hp just clicked over the 200 hour mark...running great. However, i got a Fault Code on my Vessel View showing 942-6 (O2 sensor lean response time Starboard S1)

Does that code tell me which sensor is bad? Safe to assuming it is 1 of the 2 on the starboard side? Also, motor seems to be running fine and without issue. Is this sensor something I can pull out and clean up with contact cleaner? or is that a long shot?

Thanks in advance,
D3

just replace them,,once bad,cleaning won't help

Got it, thanks...

Can anyone identify/confirm which sensor is bad based on the code?

OK, so I've replaced the pre-cat sensor on starboard side as needed. Can anyone help me with how to clear the fault code on a mercruiser 4/5L? I had assumed that after the part was replaced the code would go away. Is there an onboard technique with key? battery? kill switch start/stop? Hours of runtime? I've see lots of "tricks" but nothing seems to work. Do I need an OBD connector and device in order to clear?

THanks,
Dave