Fan Clutch Acting Weird and DTC P0528

07stroker · Jul 12, 2011

Friday, my fan clutch kicked on/off multiple times for various lengths of time, in a heavy rain during my ride home from work. I got home, checked for codes and found P0528 which is "Fan Speed Sensor Circuit No Signal".

I ran the truck the rest of the weekend and the fan turned on a couple of random times (Temperatures were not high at all) and the DTC was still present.

Yesterday, I drove home in the rain and it acted the same as it did on Friday. It almost seems that something is shorting out, but I have inspected the fan wiring harness and I have found nothing obvious.

From what I have read, the general consensus seems to be that the fan clutch is no good. Could it be the sensor?? I would hate to drop the dollars on the fan clutch if it not the problem.

Can anyone offer an opinion or has anyone had any experience with fan clutch issues?

bismic · Jul 21, 2011

The clutch and the sensor are all one part.

Dzchey21 · Jul 21, 2011

have you tried to just unhook the fan harness and see what it does? Thats the next step i would take.

I think a no signal is an open circuit code, sensor is no good or harness has an open

07stroker · Jul 21, 2011

I did find out since posting this that the fan speed sensor is a Hall-Effect sensor internal to the vistronic drive fan (Fan Clutch). So, I would think either the internal sensor is bad making the fan clutch no good or it would have to be a broken or chafed wire. In this case I have inspected the harness multiple times and found no brake/chaffing which would mean the fan clutch....

Anyways, I have ordered a new clutch which should be in tomorrow and I plan to install it this weekend....I will note whether it has solved the problem or not.

07stroker · Aug 3, 2011

Just FYI for anyone who may come across this problem in the future. Replaced the fan clutch last weekend and the problem is solved.

TheBigDeOGE · Apr 20, 2012

got a truck doing the same thing. will replace the fan clutch and see what happens. thanks for this thread.

RedRice589 · Jan 22, 2013

I have a 6.4 and i'm getting the same thing how bad of a fix was it?

TheBigDeOGE · Jan 22, 2013

New fan clutch fixed it.

yeehaw · Jan 23, 2013

glad i saw this, truck through that code on the way home, looks like that will be getting fixed.

RedRice589 · Jan 23, 2013

I think i'll be taking it to the shop for that fix thanks man.

YEEHAW you planning on doing it yourself?

yeehaw · Jan 24, 2013

nah it's zero degrees out and don't feel like doing it outside

RedRice589 · Jan 25, 2013

I feel ya. I'm gonna get it done at my buddy's shop they do alot of 6.0 stuff thx guys!

gairforce1 · Feb 28, 2013

so i was getting this same code and found the wire cut.. so i took everything apart and replaced the whole fan clutch.. put it all back together and just got the same code.. anyone have any ideas.. could the short be some where in the wiring past the clip..

yeehaw · Mar 1, 2013

I still have yet to fix mine, it throws the code every few days and i just keep deleting it. I'll fix it once it is warmer out here. Plus just been busy trying to work two jobs.