LINC Diagnostic Warning Question

[zhadley]

I was at lake Powell for a week and on the second to last day the boat started displaying a couple error messages. Boat is a 2013 SANTE 210 with the zr450. Error was otc 1418: ewmt2 higher than expected at stage 2 spn 442 fmi 0. I found one post mentioning that someone else had this code and believed it to be related to emissions. I ultimately will take it to the dealer to have it checked out but they said they are a couple weeks behind. I did fill the last tank with 87 instead of 91 if that could possibly be related? I wasn't aware that Dangling rope would only carry 87 octane! I could idle the boat fine but as soon as I started putting a load on the engine (just planing) I would get the error. Never ran hotter than 180. Any ideas appreciated. Not sure why the pictures rotated.

Zach

[a0128]

Both codes are related to an overheating issue.

DTC 1416 - Exhaust Manifold Water Temperature (EMWT) Sensor 2 Higher Than Expected Stage 1

• Exhaust Manifold Water Temperature (EMWT) Sensor
• Check Condition - Engine Running
• Fault Condition - Exhaust Manifold Water Temperature reading or estimate greater than the stage 1 limit when operating at a speed greater than defi ned in the diagnostic calibration
• Corrective Action(s) - Sound audible warning or illuminate secondary warning lamp, disable adaptive learn fueling correction during active fault. Recommend a power derate 1/2 and/or a low rev limit to protect engine from possible damage.
• Non-emissions related fault

The EMWT sensor is a thermistor (temperature sensitive resistor) located in the engine coolant. There is one located in each CES exhaust manifold. The ECM provides a voltage divider circuit so that when the coolant is cool, the signal reads higher voltage, and lower when warm.

This fault will help protect the engine in the event of over temperature. When the coolant exceeds x deg. F and engine RPM exceeds y RPM for the latch time this fault will set.

Diagnostic Aids

□ If the “EMWT2 High Voltage” fault is also present, follow the troubleshooting procedures for that fault as it may have caused “EMWT2 Sensor Higher Than Expected 1.”
□ Check that the heat exchanger has a proper amount of ethylene glycol/water and that the heat exchanger is not leaking
□ Ensure that there is no trapped air in the cooling path
□ Inspect the cooling system for cracks and ensure connections are leak free
□ Check that the raw water pickup is not blocked/restricted by debris and that the hose is tightly connected
□ Check that the thermostat is not stuck closed
□ Check that the raw water pump/impeller is tact and that it is not restricted
□ Verify that the proper amount of raw water flow is being achieved, both static and underway


DTC 1418 - Exhaust Manifold Water Temperature (EMWT) Sensor 2 Higher Than Expected Stage 2

• Exhaust Manifold Water Temperature (EMWT) Sensor
• Check Condition - Engine Running • Fault Condition - Exhaust Manifold Water Temperature reading or estimate greater than the stage 1 limit when operating at a speed greater than defined in the diagnostic calibration
• Corrective Action(s) - Sound audible warning or illuminate secondary warning lamp, disable adaptive learn fueling correction during active fault. Recommend a power derate 1/2 and/or a low rev limit to protect engine from possible damage.
• Non-emissions related fault

The EMWT sensor is a thermistor (temperature sensitive resistor) located in the engine coolant. There is one located in each CES exhaust manifold. The ECM provides a voltage divider circuit so that when the coolant is cool, the signal reads higher voltage, and lower when warm.

This fault will help protect the engine in the event of over temperature. When the coolant exceeds x deg. F and engine RPM exceeds y RPM for the latch time this fault will set.

Diagnostic Aids

□ If the “EMWT2 High Voltage” fault is also present, follow the troubleshooting procedures for that fault as it may have caused “EMWT2 Sensor Higher Than Expected 2.”
□ Check that the heat exchanger has a proper amount of ethylene glycol/water and that the heat exchanger is not leaking
□ Ensure that there is no trapped air in the cooling path
□ Inspect the cooling system for cracks and ensure connections are leak free
□ Check that the raw water pickup is not blocked/restricted by debris and that the hose is tightly connected
□ Check that the thermostat is not stuck closed
□ Check that the raw water pump/impeller is tact and that it is not restricted
□ Verify that the proper amount of raw water fl ow is being achieved, both static and underway

[zhadley]

Thank you very much for that. There was a ton of debris in the water this year due to recent flash floods. I bet I ingested something. I did check that the grate was clear on the bottom of the boat but looks like I need to go deeper. Thanks.

On a separate note, the recommended fuel is premium for this engine. Due to the fact that I put in 87 octane, would it be recommended to use an octane booster?

[a0128]

The engine ECU will retard the spark advance to protect the engine if it detects pinging. I'm not sure how useful those octane boosters are. Probably can't hurt, but will probably not be much help either. Even if your tank is not empty yet I'd start filling with higher octane fuel as soon as possible to start diluting the 87 that is in the tank.

[nyryan2001]

a0128- where did you get that info? do you have a PCM disk?

zhadley- PCM techs will tell you to use a high quality octane booster in the event you cant get what octane is spec'd for your engine. PCM techs will also tell you to run Ethanol Stabil regularly, if not all the time.... and that you can run a high quality fuel injector cleaner periodically as well.

[zhadley]

I bought marine Stabil and an Octane booster but wanted to confirm prior to putting it in the tank (and topping off with 91). I think I have 2/3 full tank currently with the 87.. Thanks.

Now I will start trouble shooting the cooling system and if it gets over my head take it down to the dealer.

[a0128]

a0128- where did you get that info? do you have a PCM disk?

Sorry no disk - just Google.

[zhadley]

you are a better Googler than me!

[zhadley]

Wow! Can't believe I picked up this much small debri. The strainer was completely full.

One problem solved and another has now arisen. I went to power on the boat and the switch (blue sea systems in by boat) just freewheels and will not engage to click on to either of the batteries. Any ideas? Batteries are both charged and none of the breakers have been tripped.

[zhadley]

I just took the switch apart and it had failed. It broke free through four screws holding the back and front together. New switch ordered! I would not have thought that something like this would fail so soon. Hopefully can get it back together before the weekend.

[nyryan2001]

holy cow look at that strainer, ensure you put it back on correctly so you don't sink your boat!!

[zhadley]

haha I was thinking of that thread the whole time