Glad the trip went well!

 

Thank you both! The only code shown is P0528. I was. Very happy to hear that fan kick up and down. I enjoyed very much watching the temps raise and lower with tight deltas when expected. Fordimus Prime seems to be a happy truck right now. I will replace the degass cap and monitor for any more spitting. The result looks like speckling in a very isolated area on the driverside rear of the engine compartment. I am beginning to believe I have a bad cap. Possibly from my previous EGR/Oil cooler failure.

I will R & R the cap.

Eric

 

Well, I am going to call this the final update to this thread.

Brought the 5VR hopme from the campground yesterday in slow traffic and hills. My temps did not get over 214 (Coolant) and about 212 (Oil). I was averaging between 198-200 while moving 50-60 MPH and 204 creeping in traffic. The 204 temp hung for a while and then dropped off rapidly to the 180's.

No visible spitting from the Degass bottle, no residue, everything looked fine. Truck ran fine. Good stuff. Thanks all!

Eric

 

I too just decided to look at my codes today after noticing a higher than normal coolant temp. Off the Edge Insight & have a P0528 & a P1335. My coolant temp was around 205-210 coming home from work and its 65 degrees F out. Using the search function as I speak.

 

Hi Eric and sorry to bring up an old thread here but I am having the same issue as you had here. I tried to figure out what you did exactly to fix your code P0528 (Fan Speed Sensor Circuit - No Signal). Did you replace the cooling clutch fan assembly as well as the cap on the degas bottle? My truck is also showing just this one code and I can't seem to get rid of it. I appreciate your input.

 

Hey there, No sweat on the thread.

The code, (on edit) I should not have said error, the PCM is not reading the fan RPM's like MCHAN said. It still reacts to temperature and that is what it needs most. At 210F it kicks on and then kicks off at 195F ECT. The fan operates as it should in my case. In speaking with a few different technicians, this code has popped on other trucks as well even though the fan is operating normally.

I checked pins and the condition of the connector and all seems well. The plastic stand off that mounts the cable was broken and was probably done during some maintenance. I am not exactly sure when. I only knew it was there after putting my Edge Insight in.

If the fan is cycling when it is supposed to at ~210 F ECT then I would say don't worry about it.

I am having head gaskets done in the next few months, and while the engine is apart I am going to have it looked at a little closer. If electrically and mechanically it remains to be sound, I am not going to mess with it. If the fan clutch is indeed not communicating with the PCM then it will be changed out.

If it does need to be changed, it is a bit of a bear to get out and back in for the first timer.

Hope that helps.

Eric

 

Hmmm... well I really don't know if the fan is working or not than because my temps did not get up to the 210 mark. It stayed pretty much around the 190 to 205 mark (empty). Just got home from a 1200km trip and my truck did something real funky on the way home. I checked my Insight though and this was the only code it brought up..... I do not think this code and the trucks strange behavior are related. Time to start a new thread I guess.

You say it is common for this code to show up even if there are no problems? Have you spoken to a lot of folks that have the same problem with this code showing up but no apparent reason for it?

 

That's correct. MCHAN had piped in about the PCM not sensing Fan RPM's. And that may be the case with mine, but I am not sure and I guess won't be until I get the gaskets done.

In asking questions about it, several people have chased thier tails trying to pin it down, even after changing the fan clutch out it still came in intermittanly. It was even suggested to me that it could be a vehicle alarm/security system that is causing it.

It is in then it isn't. Then its back again with out any rhyme or reason. Maybe MChan will chime in again, check earlier in the thread for his comments.

Eric

 

I am having an issue with my fan clutch as well. I'm getting the P0528 code as well, but my fan is coming on when the EOT and ECT temps are low. In fact sometimes the fan will come on when I first start the motor after having sat overnight. Other times it won't. Any ideas? Wiring looks good.

 

Mchan responded to another post of mine in regard to this. Basically he said if that code is the only one in and the fan operates, it is almost certain that the PCM is not seeing fan RPM from the RPM sensor. The fan is being driven by temperature.

Check your EFC (Electric Fan Clutch) wiring harness connector, top right side of fan shroud. Clean and reconnect it. Remove the shroud top (the one with the powerstroke sticker on it) and look down to the fan hub. Check for chaffing or damage to the cable. Worst case you'll need to remove and replace the fan clutch.

Hope that helps.

Eric

 

Checked the wiring harness connector, it looks good. I pulled the shroud and the wiring itself looks good. I had a coolant leak from a hose recently, and it looks like some of that coolant may have corroded the wiring. I've attached a photo for your review. Is the fan clutch bad because of the coolant?

 

Well I had extensive work done to the engine and one of the items I had replaced was the fan clutch. The code is now gone. It has been cold here in New England this winter, plenty of snow! I am looking forward to spring and summer and some elevated temps. I want to hear that fan kick in!

Eric

 

Hmm weird. My fan clutch is like a year old and i have both of those codes (p0428? and p0528). Wiring harness looks fine, disconnected and reconnected the harness for it...strange. Not getting hot yet though, luckily. summer might change that

 

In several discussions those codes have popped for no particluar reason for some and all is operating normally. Is it an aftermarket part?

 

I am not sure what it was, i just helped replace it