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Oil pressure sensor reliability

3ackok

3ackok

Cruisin' Guzzisti
Joined
Nov 6, 2008
Messages
149
Location
Baltimore, MD
I replaced the oil pressure sensor last September. Everything was OK for a while, but now I am starting to see the same symptoms again- red light, "SERVICE", "! triangle". Same error codes. Could it go bad again in less than 6 months? And these were cold winter months with not as much riding as in summer.
 
Not a long time, but I'm not surprised. One of mine only lasted a year. Wouldn't it be great if there was a more reliable substitute, especially for the CARC models where they are so hard to get at?
 
I'm about to replace mine on the Norge - I have all the tupperware off but how do I access the sensor - remove the fuel tank and air filter or go in from the left side? Access from the left seems problematic.

Help!!

Thanks
 
I went from the top, but heard from other people that it is possible to access from the front by removing left exhaust pipe.
 
Going in from the left is my preferred method. I find removing and replacing the airbox too time consuming.

Remove the left exhaust header pipe, undo the breather manifold that is obscuring the oil pressure switch, and then use a flat ring spanner (22mm from memory) to undo the switch. Still finicky, but practical.
 
I'm thinking I should be leaving this stuff to people who know what they are doing :(

I replaced the oil switch - went in from the top - and now the bike won't start. Turns over OK and I have a good spark at the plug so I'm assuming it's fuel.

I can hear the fuel pump activate when I switch on the ignition but how do I check if there is fuel being pumped? I've disconnected and reconnected the fuel line - no leaks there but is it possible the fuel is not getting past the connector?

I'd be grateful for any advice

Thanks
 
Got it sorted... I traced the fuel line from the tank and it was severely kinked. All better now but there's still an oil leak! Oh well, more work to do :S

Cheers
 
My replacement parts haven't arrived yet, but I decided to take an early start and removed the sensor to take a more careful look. I noticed that connector on the sensor was rather loose, and started to think if this could be the reason for the problem. I remember that the connector wasn't tight first time I changed the sensor, but I believed in collective wisdom and replaced the sensor without thinking twice.
So, the sensor is a simple switch, it is normally closed, which means that it is shorted when no input is applied. The switch is actuated by oil pressure through a hole on it's bottom. When the pressure is present, the switch will be in the open state. When ignition is turned on, the bike goes through self check procedure. It expects the oil pressure sensor to be shorted to the ground. If connection to the switch is bad, it will not be shorted, and SERVICE error will be generated by ECU. Bad connection could be intermittent, with the error coming up once in a while- and this is what I had. Also, it may work for a while, before the new sensor's connector will become a little dirty. I connected the sensor to a ohmmeter and pushed the switch through the oil entry hole on the bottom. I did it many times, and the switch always worked. I crimped the connector on the wire a little tighter, and i hope it will solve this issue for good. I will install the new sensor, just in case, but if anyone encounters the same issue, which seems to be common, I recommend starting with wiggling the connector wire and see if it helps even if only for a short while.
 
Sound advice that may save others/me some pennies and frustration in time waiting for a replacement for a "faulty" part.

Thanks for that.

:)
 
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