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rotax error 2245

Jeff Cox

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2015
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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?
 

Jeff Cox

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

JetTech72

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2012
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Challenger
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@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
 

Jeff Cox

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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.
 

JetTech72

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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.
 

ToonToJet

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Boat Make
Scarab
Year
2014
Boat Model
HO Impulse
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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.
 

ToonToJet

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

JetTech72

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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.
 

Bryan mazanec

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2016
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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.
 

JetTech72

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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.
 

Bryan mazanec

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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.
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.
 

TerryR

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2020
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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.
 
Last edited:

Dean P

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

1592829800489.png
 

JetTech72

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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.
 
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