P0128 Code - Ford Powerstroke Diesel Forum

 
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post #1 of 6 Old 08-17-2012, 05:41 AM Thread Starter
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P0128 Code

Been getting a P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) since coming back from my cross country trip. It is intermittent and can be cleared with the Tuner.

Question is: Engine temp is showing just in the operration range with code, without it is showing normal. To me this is either a t-state stuck open or a bad sending unit.

Ideas?

2008 F450 King Ranch 4X4
H&S Tunes
5" down pipe back exahust
4.30 L/S gears
AFE CAI
265/70R19.5 Michelins
Pure performance 4 link front suspension
Kelderman Air-Ride
FASS fuel filter
PTP EGR Delete
Train Horns under the front bumper
2013 Radio/Nav/sync upgrade


494Rwhp/975ftlbs......


Last edited by MD05; 08-17-2012 at 08:20 AM.
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post #2 of 6 Old 08-17-2012, 08:21 AM Thread Starter
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Problem solved. Thanks Eric.

2008 F450 King Ranch 4X4
H&S Tunes
5" down pipe back exahust
4.30 L/S gears
AFE CAI
265/70R19.5 Michelins
Pure performance 4 link front suspension
Kelderman Air-Ride
FASS fuel filter
PTP EGR Delete
Train Horns under the front bumper
2013 Radio/Nav/sync upgrade


494Rwhp/975ftlbs......

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post #3 of 6 Old 08-17-2012, 12:22 PM
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Originally Posted by MD05 View Post
Problem solved. Thanks Eric.
So what was the problem?

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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post #4 of 6 Old 03-13-2013, 08:09 PM
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Problem solved. Thanks Eric.
MD05, Can you elaborate on what the issue was, and what you did to correct it? Having the same issue here, and it's getting annoying to say the least. Thanks in advance!

Hodge's Towing & Recovery LLC
Hodge's Snow & Ice Management LLC

2008 F-350 6.4
AFE Straight Pipe
Spartan Tuner


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post #5 of 6 Old 03-14-2013, 03:00 AM Thread Starter
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Thermostats were the problem. ***** to get to with the EGR on, once the mounting bracket for the egr walked off the probelm was .... easy.
5-6 8mm bolts to pull the thermostats , bu tneed to pull the upper radiator hose too. Damn If I know how Ford does this with the EGR in place.

PS dont drop the cover screws you will never find them again. Don't ask how I know this.

Cheers

2008 F450 King Ranch 4X4
H&S Tunes
5" down pipe back exahust
4.30 L/S gears
AFE CAI
265/70R19.5 Michelins
Pure performance 4 link front suspension
Kelderman Air-Ride
FASS fuel filter
PTP EGR Delete
Train Horns under the front bumper
2013 Radio/Nav/sync upgrade


494Rwhp/975ftlbs......

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post #6 of 6 Old 03-14-2013, 06:40 AM
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Quote:
Originally Posted by MD05 View Post
Thermostats were the problem. ***** to get to with the EGR on, once the mounting bracket for the egr walked off the probelm was .... easy.
5-6 8mm bolts to pull the thermostats , bu tneed to pull the upper radiator hose too. Damn If I know how Ford does this with the EGR in place.

PS dont drop the cover screws you will never find them again. Don't ask how I know this.

Cheers
Sweet, doing sinister EGR delete this weekend, and I already have the T stat kit on hand...thanks man, much appreciated!

Hodge's Towing & Recovery LLC
Hodge's Snow & Ice Management LLC

2008 F-350 6.4
AFE Straight Pipe
Spartan Tuner


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