PO036 & PO141 Codes - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 07-16-2012, 05:46 PM Thread Starter
Initiate
 
Join Date: May 2012
Location: Ohio
Posts: 35
PO036 & PO141 Codes

I pulled these codes PO036 & PO141 off my 2005 cobalt. Any clue what causes this and what need replaced. Thanks for any info you can give me.
johnjr1266 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 07-16-2012, 06:19 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
Looks like your downstream HO2 sensor has bit the dust. Check fuse but first HO2 would have set codes also. Check for broken wires first, but my guess is you need an HO2 sensor.

P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2)
P0141 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

DTC P0141
Circuit Description
Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature. Voltage is provided to the heater by the ignition 1 voltage circuit through a fuse. With the engine running, ground is provided to the heater by the HO2S heater low control circuit, through a low side driver within the powertrain control module (PCM). The PCM commands the heater ON or OFF to maintain a specific HO2S operating temperature range. The PCM determines the temperature by measuring the current flow through the heater and calculating the resistance. Based on the resistance, the PCM can predict the sensor temperature. For diagnosis, the PCM monitors the heater current with the engine running. The PCM also calculates the heater resistance on a cold start. Both diagnostics will only run once per ignition cycle. If the PCM detects that the heater current or the heater calculated resistance is not within an expected range, DTC P0141 sets.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly

Last edited by Coby7; 07-16-2012 at 06:28 PM.
Coby7 is offline  
post #3 of 5 (permalink) Old 07-16-2012, 06:23 PM Thread Starter
Initiate
 
Join Date: May 2012
Location: Ohio
Posts: 35
Thanks...Thats the one after the converter? there are only two correct?

---------- Post added at 09:23 PM ---------- Previous post was at 09:20 PM ----------

Last question. Is there a certain brand I should get or does it not matter. Thanks again.
johnjr1266 is offline  
 
post #4 of 5 (permalink) Old 07-16-2012, 06:30 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
Yes only 2 and yes the downstream is the one after the converter.

AC Delco or OEM, people on here have had difficulties with bosch.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly

Last edited by Coby7; 07-16-2012 at 06:37 PM.
Coby7 is offline  
post #5 of 5 (permalink) Old 07-16-2012, 06:32 PM Thread Starter
Initiate
 
Join Date: May 2012
Location: Ohio
Posts: 35
Thanks
johnjr1266 is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome