2020 3L check engine light P3196

ian cloutier · December 28, 2020

Hey guys! 17K on the truck and got a check engine light last night. Called onstar they gave me a code P3196 however didn’t know what it was for, the dealer is still looking but don’t know off hand.

Strange for a new truck to have a check engine light.

redwngr · December 28, 2020

P3196 - Low Temperature Coolant Pump Speed Performance

Indicates pump speed performance problem. One failure mode for when pump commanded speed = 0 and another for when pump speed commanded >0

I'm a little surprised Onstar wouldn't/couldn't give the info.

Wasn't this code, but they read the info and followed up with the info in an email when mine had a CEL.

Maybe just a sensor/harness issue?

Device or wiring in circuit that powers the on pump?

Curious what they find.

ian cloutier · December 30, 2020

On 12/28/2020 at 11:34 AM, redwngr said:

P3196 - Low Temperature Coolant Pump Speed Performance

Indicates pump speed performance problem. One failure mode for when pump commanded speed = 0 and another for when pump speed commanded >0

I'm a little surprised Onstar wouldn't/couldn't give the info.

Wasn't this code, but they read the info and followed up with the info in an email when mine had a CEL.

Maybe just a sensor/harness issue?

Device or wiring in circuit that powers the on pump?

Curious what they find.

Dealer got back to me and said the same, the cooling system on the turbo wasn’t cooling as required and could be the pump. Booked in to be looked at. Weird!!

redwngr · December 30, 2020

Maybe they meant the pump that moves coolant for the intercooler that cools the air after it has been compressed by the turbo.

ian cloutier · December 31, 2020

On 12/28/2020 at 11:11 AM, ian cloutier said:

Hey guys! 17K on the truck and got a check engine light last night. Called onstar they gave me a code P3196 however didn’t know what it was for, the dealer is still looking but don’t know off hand.

Strange for a new truck to have a check engine light.

Dealer had this to say? Check engine light went out on its own on its way to the dealer, does this mean there’s a TSB? Can someone look it up?

Rubyralph · December 31, 2020

Interesting... My truck threw a CEL this week (emission message, 160 miles until limited speed 65 MPH) this was the second time in 800 miles and my truck only has 3800 miles on it. I have had 5 CEL since new three times in the dealership, the other two cleared after second or third ignition cycles. The first time was during the test drive with only 55 miles on the odometer!

Every time the dealer said it was the emission system related to the DEF system, DEF tank heaters and now the pump. This week the service manager said they had to order parts i.e. a coolant? pump, hoses, and a control module. Sorry I don't have any codes or part numbers to share but when the parts are in and replaced I will follow up. Also I have only shown two gauge bars of DEF fluid used since new, I have always felt the DEF system wasn't injecting enough DEF into the engine, maybe I was correct?

Side note my last tank MPG was low 23 MPG highway mostly, I filled up after my service appointment this week and saw a improvement to 31 MPG highway which made me feel better...at least for now!

ian cloutier · January 12, 2021

On its way back to the shop today, getting the turbo intercooler pump replaced on warranty.

Joe Schneting · June 18, 2021

Having the same engine code, same issues seems like, any new info since the pump has been replaced?

lennstang · December 27, 2021

22K on my 2020 3.0 Duramax. Just got this code. Electric coolant pump is bad. Turns out they are on backorder! Must be an issue if they don't have any left in inventory.

Edited December 27, 2021 by lennstang

Supreme Pizza · December 27, 2021

3 hours ago, lennstang said:

22K on my 2020 3.0 Duramax. Just got this code. Electric coolant pump is bad. Turns out they are on backorder! Must be an issue if they don't have any left in inventory.

They have to make sure that enough pumps are available for the paying customers. If your a warranty repair, your on the back burner. The factory is installing 500,000 pumps a day on new rigs that they are planning selling. Call up a different dealer, and say you don't have a warranty, and want to pay cash for one. Just give them the part number, and ask to buy it. See what they say.

Doc76 · January 3, 2022

2020 Silverado 3.0 Duramax, 46K Miles. Same code. Part has been backordered since November. At first the light was only on once in a while, now it's on all the time.

I asked the service department if it's ok to continue driving and they said as long as the truck isn't in limp mode, then it should be ok. Not too happy it has taken this long to get the part and get it fixed.

lennstang · January 4, 2022

On 1/3/2022 at 11:26 AM, Doc76 said:

2020 Silverado 3.0 Duramax, 46K Miles. Same code. Part has been backordered since November. At first the light was only on once in a while, now it's on all the time.

I asked the service department if it's ok to continue driving and they said as long as the truck isn't in limp mode, then it should be ok. Not too happy it has taken this long to get the part and get it fixed.

My check engine light is constantly on. I've been using my Dodge Charger as much as possible and only driving my truck when I need to tow my snowmobiles. I believe this pump cools the turbo. Coolant is still flowing but not fast enough when you start working the motor....such as up a long hill or towing. I noticed the ecu pulling power up hills when towing. This must be because the heat building up in the turbo. I'm anxious to have the pump replaced asap. Patiently waiting. I really like this diesel.

Edited January 4, 2022 by lennstang
Fix

lennstang · January 4, 2022

Just found this online. Guess there are 2 electric coolant pumps on this engine. Not sure which one is acting up but this is a good read: https://static.nhtsa.gov/odi/tsbs/2019/MC-10165111-9999.pdf

ironcole24 · January 6, 2022

Yep. My intercooler pump is on back order also. As of 12/30/2021. I wonder how they do not even have an idea when they will be available. My dealer told me I could not drive it. So I’m stuck in Michigan or I will have travel back home to Florida and fly back to get my truck when it is fixed.