Not sure if this is the right place to post so admin please move if needed.96 degrees, mountains of North Carolina/Virginia. Climbing around Fancy Gap on I-77 and with no warning truck says "power Reduced". Dropped to 15 mph towing the below 5vr up the rest of the hill. Gauges all good, DEF good, fuel filter good. Nothing giving me any warning or explaining the power reduction.Could it be that the heat and climbing just put the system in to reduction to protect it?I shut of the engine later at the nearest exit/gas station and it reset and pulled fine the rest of the 30 miles to Wytheville KOA where we are overnight tonight.Any ideas?

I wondering if it's the result of the system going through the regeneration cycle.

2edgesword wrote:I wondering if it's the result of the system going through the regeneration cycle.I didn't see any message on the info center about regen, I thought that too but pulling that much weight from Florence, SC today, I would think it would have burned the crud out of the filter?

2edgesword wrote:I wondering if it's the result of the system going through the regeneration cycle.regen won't trigger a power reduction.Did the Check engine light come on? If so did you read codes?Even if check engine light didn't come on, try reading codes and see if there are any pending codes or stored codes.Overheating, overtemp on the tranny will trigger power reduction, but it doesn't seem from your description that was the case.look in your diesel suppliment in the owners info, It has a section on what can trigger a power reduction.

That happened to me once. My problem was the thermostat.If your thermostat is not opening fully, maybe your engine got too hot on the uphill but was able to run without overheating on more level road.

A buddy had that happen while we were pulling car trailers from Crows Landing to Idaho coming up that big hill on the way to Reno from the Valley. We replaced his fuel filter and it was fine.

Duramax Power Reduction | Good Sam Community

Mortimer_Brewst
Explorer II
Jun 18, 2018
The power reduction is commonly called “limp mode”, and can be caused by a variety of things. The Duramax Forum would be a good place to read up on it.
ksss
Explorer
Jun 18, 2018
A buddy had that happen while we were pulling car trailers from Crows Landing to Idaho coming up that big hill on the way to Reno from the Valley. We replaced his fuel filter and it was fine.
RoyF
Explorer
Jun 18, 2018
That happened to me once. My problem was the thermostat.

If your thermostat is not opening fully, maybe your engine got too hot on the uphill but was able to run without overheating on more level road.
ktmrfs
Explorer II
Jun 18, 2018
2edgesword wrote:
I wondering if it's the result of the system going through the regeneration cycle.

regen won't trigger a power reduction.

Did the Check engine light come on? If so did you read codes?

Even if check engine light didn't come on, try reading codes and see if there are any pending codes or stored codes.

Overheating, overtemp on the tranny will trigger power reduction, but it doesn't seem from your description that was the case.

look in your diesel suppliment in the owners info, It has a section on what can trigger a power reduction.
hyattjlbb
Explorer
Jun 18, 2018
2edgesword wrote:
I wondering if it's the result of the system going through the regeneration cycle.

I didn't see any message on the info center about regen, I thought that too but pulling that much weight from Florence, SC today, I would think it would have burned the crud out of the filter?
2edgesword
Explorer
Jun 18, 2018
I wondering if it's the result of the system going through the regeneration cycle.

Forum Discussion

Duramax Power Reduction

About Travel Trailer Group

Related Content

Duramax Torque Management

Bye Bye DuraMax

2020 Chevy Duramax 3.0 Diesel

Duramax L5P Fuel Mileage

Duramax emissions cheating scandal