rotax error 2245

hey gang,
have starboard engine fault 2245. am bringing it to dealer tomorrow. here's my question....so far haven't been so successful with my Chap 5 year warranty but this is my first engine problem. worried that thia will yet again not be covered by warranty. there is no reduction in performance, code does not clear turning off boat. anyone have ideas what is going on?

sensor maybe?
P2245 ECM Lambda Sensor aging fault downstreams of catalyst - Sensor Voltage too low

http://www.ngkntk.co.uk/index.php/technical-centre/lambda-sensors/what-does-the-lambda-sensor-do/

i had found that website as well...my dealer mentioned that the code was something different in his manual but didn't elaborate.

@genwrx is right, it's really a Post Cat Oxygen sensor fault.
Tell your dealer to read the Service Manual correctly.
P2245 : Lambda Sensor aging fault downstream of catalyst – Sensor Voltage too low

Just to close the loop on this topic....it was the Lambda oxygen sensor. Took over 3 weeks to get answers and approvals from Rotax to fix. Once dealer authorized to open her up and replace, found it heavily torn up (his words), got the Ok to replace BOTH sides as the other was just as bad.
He did say he was told by Rotax to change the way to flush the engines post use. flush as normal with engine running. Turn off engine. Disconnect hose, turn engine on again, slightly rev for a split second then turn off engine. I can confirm a ton of water comes back out compared to the old way dealer originally taught me which was to flush with engines running, turn off engines, disconnect hose and done.

You always want to turn water 1st & do a couple throttle blip to evacuate as much water from exhaust system, before shutting the engine.
You can run engine 30sec without water no problem, plenty of time to expel water from exhaust.

I have a Error Code P2245 that just showed up on my Scarab 195 Impulse at 85 hrs. Is this normal and can I change it out myself or is this a dealer only job? I don't have any warranty on my motor.

@JetTech72 @Scarabtech Any chance you know where I can order this part online and any installation instructions?

It's the Post Catalyst O2 sensor (downstream) that needs to be replaced.
Since that O2 sensor is only there for diagnostic & monitoring purposes, and has no particular fueling function.
You could run the boat without damaging the engine, just have to deal with the annoying check engine warning.

If you want to replace the sensor, you can find them online for about $60.
http://store.chiefenterprises.com/Products/Sensors/0258006956-Oxygen-Sensor

BOSCH # 0258006956
BRP # 707600872

My suggestion would be to take the exhaust system apart & clean the mating flanges before reassembling it, and installing a new sensor.
There is a good possibility that a slight leak at the mating flanges is causing the problem you are seeing.

I am currently suing over this issue. Happened at 38 hours and they replaced both assemblies, fully, and then it happened to me again and the boat has now 71 hours on it. I was told I needed to have the full assemblies replaced again! The dealer then tells me they just cleaned the sensors and all was well, first time back on the water and 25 minutes in, warnings popping again. So disappointed in this 70k boat and making 3 payments on it, plus storage and not being able to use it.

Post Catalyst O2 sensors fault shouldn't prevent you to use the boat, it's just annoying to see the check engine light on.
The diagnostic of the sensor is probably too sensitive, all that to make sure the boat doesn't pollute.

JetTech72 said:

Post Catalyst O2 sensors fault shouldn't prevent you to use the boat, it's just annoying to see the check engine light on.
The diagnostic of the sensor is probably too sensitive, all that to make sure the boat doesn't pollute.

Click to expand...

I was told per chaparral corporate not to operate the boat for an extended period of time with these error codes. I'm not willing to void the warranty.

Hmm. I see most of the comments are from 2017. I have a brand new (2020) Scarab 255 Open ID with less than 12 hrs on it when I received the P2245 error code on the starboard engine. I guess Rotax has not fixed this issue. Have been flushing according to the procedure outlined above by Jeff Cox. Quite disappointing since the summer boating season is just gearing up (Covid-19 delayed in Maryland.) Now, instead of enjoying the season, I'm schlepping it back to Delaware for service. Was hoping it was an isolated incident but then my hopes were dashed when I found this forum. When I got the boat back to the dock, the error code was gone. Still get the "check engine" light when the starboard engine is turned on, but no error code anymore. Also, the check engine light goes away when the starboard engine is turned off.

TerryR said:

Hmm. I see most of the comments are from 2017. I have a brand new (2020) Scarab 255 Open ID with only 12 hrs on it when I received the P2245 error code on the starboard engine. Guess Rotax has not fixed this issue. Have been flushing according to the procedure outlined above by Jeff Cox. Quite disappointing since the summer boating season is just gearing up (Covid-19 delayed in Maryland.) Now, instead of enjoying the season, I'm schlepping it back to Delaware for service. Was hoping it was an isolated incident but then my hopes were dashed when I found this forum.

Click to expand...

Hi. to the forum. Sorry to hear about the fault code. I looked it up. Below is what I found.

If the check engine is ON but there is no Fault in the Fault Menu page, that means the fault is in healing condition & the check engine will eventually turn OFF after 3 or 4 driving cycle. Similar to a car. Seeing P2245 at only 12hrs is not common, I have heard of that fault showing up more in the 50 to 100hrs when operating in salt water & much later in fresh water.

I’m just adding my O2 sensor story, in case it helps anyone else, since I get a lot of good information from these forums. I have a 2019 Scarab 195G with the dark brown catalytic converter. My check engine light came on during my first day of vacation this year, bummer. I took it to a local dealer who read the code and said that I had an aging O2 sensor. I asked him if I could still run the engine. He cleared the code, and said have a nice vacation. Unfortunately, I didn’t record the fault code. The check engine light didn’t come back on that week, but we did more anchoring than motoring, and only motored at slow speed for the most part. A couple weeks later I was running at high speed and the check engine light returned. This time I was smart enough to record the fault code, P2245. The check engine light stayed on, but there was no detectable change in the performance of the engine. Interestingly, I run almost always in salt water, and I now have about 65 hours, which fits nicely with the 50 to 100 hours mentioned by JetTech72 in the post above. I called my dealer now that I’m back home, gave him the P2245 fault code, and told him that it was the post-catalytic converter O2 sensor, presumably he knew this. He ordered me an O2 sensor, and I took the boat in for service once the sensor arrived. Luckily, this was covered by warranty, since I’m still under three years. I took the boat out last week and ran at speed for quite a while. No more fault code or check engine light. Looks like replacing the O2 sensor did the trick.

I’m just sharing some additional information on the oxygen sensors. It is now 2024 and I have approximately 105 hours on my 2019 Scarab 195G. The check engine light came on again, and this time I had fault code P013F and intermittent P0136. These are both oxygen sensor fault codes. I replaced the post-catalyst oxygen sensor, and the check engine light went out after a few engine start cycles. The P013F is still there, but I’m hoping that it too will go away over time. I’m starting to think that I’ll need to replace this oxygen sensor every few years. I operate the boat nearly always in salt water, so I’m guessing that accelerates the time to failure.

I used the oxygen sensor mentioned in the link below. The sensor tip is a bit of a different design, but I’m hoping that maybe this one will last longer. I also found the sensor socket in the second image to be useful. I got this socket at Advance Auto Parts.

O2 Sensors, 2014 Scarab 195 HOI

P2245 showed up today, time to replace the O2 sensors, only 29hrs on the clock. I will get them to replace both as its an easy job so do both while they are in there

JetBoat195G said:

I’m just sharing some additional information on the oxygen sensors. It is now 2024 and I have approximately 105 hours on my 2019 Scarab 195G. The check engine light came on again, and this time I had fault code P013F and intermittent P0136. These are both oxygen sensor fault codes. I replaced the post-catalyst oxygen sensor, and the check engine light went out after a few engine start cycles. The P013F is still there, but I’m hoping that it too will go away over time. I’m starting to think that I’ll need to replace this oxygen sensor every few years. I operate the boat nearly always in salt water, so I’m guessing that accelerates the time to failure.

I used the oxygen sensor mentioned in the link below. The sensor tip is a bit of a different design, but I’m hoping that maybe this one will last longer. I also found the sensor socket in the second image to be useful. I got this socket at Advance Auto Parts.

O2 Sensors, 2014 Scarab 195 HOI

Click to expand...

The cause of this issue according to the manufacturer is the catalytic converter. Who puts a catalytic converter on a jet boat? I digress. The process is explained in a BRP Warranty Bulletin No: 2018-01(W) dated February 9, 2018. Although I have a 2019 Scarab 195G it fit the Model engine (ALL 4-TEC 150, 200 and 250 ECT with Catalytic Converter). They called this "Campaign Monitoring" and you will get zero cooperation if this is your problem and you seek to have it repaired for free. DONT BOTHER. DIY! So, to the PROBLEM... and I quote "O2 sensor malfunction can occur if water leaks past the o-ring between the pipe head and housing assembly, or between the housing assembly and tail cone. Fault codes indicating an oxygen (O2) sensor malfunction are displayed." The solution is too long to type out here but essentially they require the removal of the pipe head and tail cone from the catalytic converter. To install two new o-rings and replace the offending O2 sensor/s. NOTE: the 02 sensors will come with the catalyst o-rings if you order the correct part. The key to this repair gesture, is to force you to redo the bolt tightening procedure (the bolts that attach the pipe head and tail cone to the catalyst) using a 6 mm Ball Hex Driver (PN 361845), use LOCTITE 243 on each bolt, Using an opposing pattern to initially tighten all bolts to 11.3 N m, then proceed using the same pattern to 24.4 N m. Then reinstall the catalyst on the engine. FYI, watch that center post catalyst mount. The left side bolt is cock blocked by hoses for easily reinserting. Simply to the opposing right side bolt first and as impossible as it may sound, you can use your long arm to reach over the top of the catalyst and wrap back down and under to access the left side bolt hole. Just push it through as it should be aligned already. Then send in your massive extension with your 6mm Ball Hex driver tip. Enjoy.