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2006 Civic EX P0128 Code? #4633754
01/13/18 04:15 PM
01/13/18 04:15 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
So today I was driving down the road and CEL came on my 06 Civic EX, after scanning the code it's P0128.

Usually temperature gauge on the ODO shows 3-4 dots on the highway and they rise once I am in stop and go traffic.

I think thermostat is stuck open and needs to be replaced. Anyone has any other ideas or advice? Thanks very much thumbsup


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633789
01/13/18 04:48 PM
01/13/18 04:48 PM
Joined: Sep 2005
Posts: 6,161
MIchigan
Warstud Offline
Warstud  Offline

Joined: Sep 2005
Posts: 6,161
MIchigan
Yep...Time to change the T-Stat.

Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633790
01/13/18 04:48 PM
01/13/18 04:48 PM
Joined: Nov 2004
Posts: 7,865
Texas
GMBoy Offline
GMBoy  Offline

Joined: Nov 2004
Posts: 7,865
Texas
Replacing the thermostat is exactly what you need to do in 99% of the cases with a P0128. The ECM has sensed that the car is not to operating temp in a given amount of time and you've proved it with the gauge.

Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633880
01/13/18 06:40 PM
01/13/18 06:40 PM
Joined: Jun 2005
Posts: 5,323
North Texas
ARB1977 Offline
ARB1977  Offline

Joined: Jun 2005
Posts: 5,323
North Texas
Originally Posted By: maverickfhs
So today I was driving down the road and CEL came on my 06 Civic EX, after scanning the code it's P0128.

Usually temperature gauge on the ODO shows 3-4 dots on the highway and they rise once I am in stop and go traffic.

I think thermostat is stuck open and needs to be replaced. Anyone has any other ideas or advice? Thanks very much thumbsup

How many miles on your civic?


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633919
01/13/18 07:25 PM
01/13/18 07:25 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Currently 198k


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633927
01/13/18 07:30 PM
01/13/18 07:30 PM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline
HoosierJeeper  Offline

Joined: Nov 2016
Posts: 1,303
WI
Definitely time. Get OEM only.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633932
01/13/18 07:36 PM
01/13/18 07:36 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Planning to go OEM. Could there be any other issue with software or sending sensor unit? Thank you.


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4633936
01/13/18 07:43 PM
01/13/18 07:43 PM
Joined: Nov 2016
Posts: 1,303
WI
HoosierJeeper Offline
HoosierJeeper  Offline

Joined: Nov 2016
Posts: 1,303
WI
I suppose but at that mileage, it sounds like the tstat is about worn out. Maybe if you had just replaced the tstat and still had that code maybe it's the coolant temp sensor.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4634037
01/13/18 10:16 PM
01/13/18 10:16 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Not sure why 2 part numbers? https://www.hondapartsnow.com/oem-honda-thermostat.html?Vin=2HGFG12896H575234&Filter=()


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4634065
01/13/18 10:51 PM
01/13/18 10:51 PM
Joined: Sep 2005
Posts: 6,161
MIchigan
Warstud Offline
Warstud  Offline

Joined: Sep 2005
Posts: 6,161
MIchigan
Ones made by Fuji Seiko the other is a Nippon

Re: 2006 Civic EX P0128 Code? [Re: Warstud] #4634068
01/13/18 10:53 PM
01/13/18 10:53 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Originally Posted By: Warstud
Ones made by Fuji Seiko the other is a Nippon


Thanks, interesting on the web page it says both made by Fuji.


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4634069
01/13/18 10:55 PM
01/13/18 10:55 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Planning to buy https://www.amazon.com/gp/offer-listing/...p;condition=new OR

https://www.ebay.com/itm/Genuine-OEM-Honda-Civic-Thermostat-w-Gasket-2007-15-EXC-Si-Hy-19301-RNA-315/112645816375?hash=item1a3a36c037:g:uDkAAOSwldRaD2Jm:sc:USPSFirstClass!20109!US!-1&vxp=mtr


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: 2006 Civic EX P0128 Code? [Re: maverickfhs] #4634131
01/14/18 12:36 AM
01/14/18 12:36 AM
Joined: Feb 2014
Posts: 2,750
CZ factory 🏭 KC KS
Marco620 Offline
Marco620  Offline

Joined: Feb 2014
Posts: 2,750
CZ factory 🏭 KC KS
If the fuel economy is tanking and the exhaust is running rich its 02


15' Civic 1.8 i-vtec 221,000 mi 0w20 Redline/Redline CVT/Archoil9100/TEIN/Eibach/Tanabe Sustec/Borla Exhaust/87 E0 fuel/Yokohama
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