Go Back   DIY Chatroom Home Improvement Forum > Do It Yourself > Automotive Repairs


Thread Tools Search this Thread Display Modes
Old 02-01-2011, 04:37 PM   #1
Join Date: Jul 2005
Posts: 137
Share |

P0128 code - Thermostat

This code came up for my car.

P0128-Thermostat opening too soon causing engine to run cold. (now fixed)

Would this be a possible cause for somewhat low mpg?

Just don't feel my Cavalier is getting the best mileage.

Average at 27mpg (mostly highway)

Last edited by fjacky; 02-01-2011 at 04:40 PM.
fjacky is offline   Reply With Quote
Old 02-01-2011, 05:50 PM   #2
Master General ReEngineer
Bondo's Avatar
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 3,683

P0128 code - Thermostat

Would this be a possible cause for somewhat low mpg?
Ayuh,... It'll cause it to run very Rich....

Bondo is offline   Reply With Quote
Old 02-01-2011, 07:39 PM   #3
ukrkoz's Avatar
Join Date: Dec 2010
Posts: 571

P0128 code - Thermostat

mpg in general drops down winter time.
1. engines run colder
2. takes more time for engine to warm up
3. cold engine = more gas used
4. outside colder air = more dense air = more O2 = more gas used
5. dreaded winter gas formulation = more gas used.
ukrkoz is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Honeywell Thermostat code 0340-reset? George Foote HVAC 3 02-14-2011 12:52 PM
Problem with Lennox Pulse Furnace Wiring to Thermostat scalvin Electrical 4 12-30-2009 07:48 PM
Two Wire 24V Thermostat to Digital Thermostat on Pellet Stove jrodtaclet Electrical 4 09-15-2009 05:37 PM
Thermostat wiring jetmanaz HVAC 1 08-09-2009 07:13 PM
Distance between Heater & Combustibles DIY_JC Building & Construction 7 01-20-2009 07:52 AM

Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.