2009 fat boy problem
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2009 fat boy problem
Hey so yesterday while riding my fat boy my Speedo and odometer stopped working and shortly after engine light came on, ran the diagnostic the bike has installed and error P0502 came up which is a speed sensor (from what I googled) and so I cleared the code and no engine light anymore but Speedo and odometer not working and then today when I went to go for a ride the oil light came on but only just recently had a service 1000km ago and still full of oil, any ideas as to what my problem is?
Stellar HDF Member
Joined: Aug 2011
Posts: 2,736
Likes: 1,785
From: Newnan, GA
Hey so yesterday while riding my fat boy my Speedo and odometer stopped working and shortly after engine light came on, ran the diagnostic the bike has installed and error P0502 came up which is a speed sensor (from what I googled) and so I cleared the code and no engine light anymore but Speedo and odometer not working and then today when I went to go for a ride the oil light came on but only just recently had a service 1000km ago and still full of oil, any ideas as to what my problem is?
BTW, did you recently do any work to the bike or have any work done?
Inspect the plug and look for damage.
I looked up the wiring on my bike (2009 FLHTCU), it may help.
P0502 VSS Sensor High/Open
Speed Sensor
Pin 1: 5VDC
Pin 2: Speed output
Pin 3: Ground
ECM
Pin 50: 5VDC
Pin 40: Speed Input
Pin 64: Ground
Does your Throttle work okay? (shares the same 5VDC line).
Check ground and 5 VCD at the sensor.
Ohm out the harness. from the sensor to the ECM.
If it all is OK, get a new sensor.
Last edited by Mongo1958; Jan 3, 2025 at 09:02 AM.
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