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496MAG HO Alarm

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gt40

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I have a pair of 496 Mag ho br

I have a pair of 496 Mag ho bringing up an alarm BLK PRESSURE HIGH on the smart craft but when I put the DDT tool on I dont get any fault codes for this.
Has anyone got any ideas what this is and how to rectify it.
 
"The seapump pressure sensors

"The seapump pressure sensors on the Smartcraft engines frequently "shift" in value and will read high pressure even when there is no pressure. Using your DDT, what is the seapump pressure reading when engine is not running? If it shows any pressure at all, the sensor is bad."
 
"Thanks for that, I have also

"Thanks for that, I have also found out that they need to be grounded and may have trouble doing this if the pump mounts are a bit rusty etc."
 
"A three wire sensor like a Se

"A three wire sensor like a Seapump Pressure Sensor does not need to be grounded. Like I said, the first thing to check is the key-on/engine-off pressure."
 
Thanks for that Dave. tested b

Thanks for that Dave. tested both engines and one was reading 40PSI when engine not running and the other one was zero but was also zero when engine was running. Replaced both senders and boat runs like a dream. Appreciate your help.
 
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