P0198
Thread Starter
|
Fleet Mechanic
Joined: Oct 2006
Posts: 1,351
Likes: 242
From: North Florida
P0198
First of all I have an 04 6.0 FX4 cc with 50k miles and currently no mods. While driving, the engine lost a lot of power and it's hard to explain but it sounded like a gas engine was reving up where my tubo should have been whining. you know the sound when you have the hood up on a gasser and rev it up and you mostly hear the fan. Thats what it sounded like when throttling up. It gave a code P0198 (engine oil temp high). After sitting off for an hour, it ran normally but with the check engine light on. I'll definately be taking it in to the dealer, but I would like to have an idea what's going on. Any ideas?
Postmaster
Joined: Jan 2005
Posts: 4,743
Likes: 3
From: Peoria, IL
Sounds to me like your engine oil got to hot and the engine detuned itself to keep from causing damage. The loud noise you heard was probably the fan kicking in to try to help cool the truck down.
If you oil is overful it could have started to foam up and not circulate properly. This could have caused the overheating. Your oil cooler could also be plugged up and not cooling the oil properly.
Were you towing or loaded when this happened?
If you oil is overful it could have started to foam up and not circulate properly. This could have caused the overheating. Your oil cooler could also be plugged up and not cooling the oil properly.
Were you towing or loaded when this happened?
Thread Starter
|
Fleet Mechanic
Joined: Oct 2006
Posts: 1,351
Likes: 242
From: North Florida
This is the second time it happened. The first time I was towing a 4000 lb trailer about 65mph on the Macon bypass 3 hours into a 10 hour trip, and I had changed the oil just before leaving. I was kinda in a jam so I cleared the code to see if it was a fluke and I had no problems the rest of the trip. That was about 4000 miles ago. This time (on the same oil) I was completely empty driving through town, but I had just left a stop light quckly to mix in a little of the "drive it like you stole it" advice I get off of this forum. My oil is definately overfull. I didn't know that was a big issue before I started to research this problem. Maybe the thing to do is to go ahead and change the oil and fill it to the proper level (the min mark?). I don't want to clear the DTC in case I end up taking in to Ford. Will the check engine light clear after a number of key on key off cycles?
Postmaster
Joined: Jan 2005
Posts: 4,743
Likes: 3
From: Peoria, IL
I beleive that the check engine light will go off after a certain number of key cycles (assuming you don't overheat again), but the code should stay in the computer until you clear it.
You may want to consider looking into a set of gauges so you can watch your oil temp more closely. The temp gauges in the stock cluster are pretty much just dummy lights, and won't move until after you are already overheating.
You may want to consider looking into a set of gauges so you can watch your oil temp more closely. The temp gauges in the stock cluster are pretty much just dummy lights, and won't move until after you are already overheating.
Thread Starter
|
Fleet Mechanic
Joined: Oct 2006
Posts: 1,351
Likes: 242
From: North Florida
Gauges are on my list (it's a long list) and I'm wide open to suggestions on what needs gauges and what gauges to buy. On a side note, it's interesting that I have a Superchip Flashpaq, and both times this has happened the truck was running the stock tune, I only used the tuner to pull the code.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
P0198: Engine Oil Temperature Sensor High Voltage/High Input
Fault trigger: Checks EOT for a temperature lower than a specified oil temperature expected for normal operations when EOT voltage is greater than 4.76 volts.
Probable causes: open in circuit/short to power
This is what the 6.0 bible says
Fault trigger: Checks EOT for a temperature lower than a specified oil temperature expected for normal operations when EOT voltage is greater than 4.76 volts.
Probable causes: open in circuit/short to power
This is what the 6.0 bible says
Trending Topics
Trailering
Joined: Aug 2020
Posts: 15
Likes: 0
From: North GA
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Hoosier 7.3
1999 - 2003 7.3L Power Stroke Diesel
11
Jun 29, 2013 04:49 PM
Franko72
1999 - 2003 7.3L Power Stroke Diesel
20
Feb 28, 2012 09:33 PM
