Go Back   Chevy Equinox Forum | GMC Terrain Forum | Cadillac SRX Forum > Chevy Equinox General Discussion > 05-09 Equinox Maintenance

05-09 Equinox Maintenance

I have a weird problem. Need help

This is a discussion on I have a weird problem. Need help within the 05-09 Equinox Maintenance forums, part of the Chevy Equinox General Discussion category!

LinkBack Thread Tools Display Modes
Old 12-22-2018, 04:09 PM   #1 (permalink)
Junior Member
Join Date: Dec 2018
Age: 31
Posts: 1
Rep Power: 0
Donsinger89 is on a distinguished road
Default I have a weird problem. Need help

I have a 2007 Chevy equinox AWD. The issue started as a P0420 check engine code. Car seems to run normally other than when the code is popped the car shifts somewhat sluggishly.

Things I have replaced so far:
Both 02 sensors(the downstream was pretty clogged with carbon so worth the new part)

Catalytic converter(since returned because Iím sure it wasnít the problem)

Spark plugs and cables

2 separate Engine coolant temp sensors(this is my main issue)

From my understanding, if the computer is getting innacurate readings of the engineís temperature it could cause the engine to run rich. That could cause the P0420 code, right?

The reason I thought this could be the problem is on a long drive I noticed that my temp gauge was pegged and pulled over immediately. I opened the hood and everything seemed to be the normal operating temperature. So I figured it was the engine coolant temp sensor. I replaced the part twice and after resetting the code the gauge pegs and I get a message that says engine hot ac off.

The weird part of this is that as soon as the check engine code pops the temperate gauge functions properly and the car no longer gives the message engine hot ac off. I have reset the code three times and the same issue occurs.

Iíve check the wiring harness to the sensor to the best of my ability. Iím not sure what else to do. Any advice from some more qualified folks would be greatly appreciated.
Donsinger89 is offline   Reply With Quote
Old 03-06-2019, 09:19 AM   #2 (permalink)
Junior Member
Join Date: Mar 2019
Location: Indianapolis
Age: 42
Posts: 4
Rep Power: 0
RampRat31 is on a distinguished road

Did you check your throttle body assembly for contaminants as well as your intake filter? Sometimes, when one or the other gets dirty/clogged, it will fool the ECM into dumping more fuel into the engine. Another thing is the blasted fuel cap issue that GM is notorious for.
RampRat31 is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem with O2 Sensor bobbycampos 2010+ Equinox General Forum 2 12-20-2016 04:24 PM
05 rear end problem. Chrisb 05-09 Equinox Maintenance 1 11-17-2015 07:30 AM
Weird trouble prheaume 05-09 Equinox Maintenance 2 08-09-2014 11:30 PM
Just another problem Lew2156 05-09 Equinox General Forum 2 03-19-2013 02:58 PM
2010 nox hid problem ponczek 2010+ Equinox General Forum 1 01-11-2011 08:14 PM