Error Codes 15 and 44

Error Codes 15 and 44

Postby SWeaver724 [OP] » December 3rd 2019, 2:17am

Hello! I have a 1995 GMC Safari that I’m a little puzzled with, when I first start the van it runs well with no code but after driving for about 15 minutes it will throw on the service engine light and it gives me the codes 15 and 44! When the light comes on it will start idling oddly and and on occasion stall other times the light will go away and it will run well for another random period of time! Any suggestions on what could possibly be wrong??? I recently had the water pump, coolant temp sensor, and pretty much all my lines (brake, gas, trans etc.) replaces!
Original Poster [OP]
SWeaver724
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: SWeaver724 has been a member for 1 full year
Posts: 3
Topics: 1
Joined: December 2019
Gender: Male
Alias (AKA): Sean
Van Model Year: 1995
Van Make/Model: GMC Safari
Extra Info: 4.3L RWD

  • Similar topics
    Replies
    Views
    Author
  • advice required on P0113 error
    by gordo999 » September 26th 2020, 4:41am in Engines
    10 Replies
    219 Views
    Last post by AstroWill View the latest post
    October 4th 2020, 1:33am
  • Hard Cold Start and Rough Idle. No Codes. Diagnosis?
    by AstroTan » October 17th 2020, 5:26am in Engines
    12 Replies
    622 Views
    Last post by AstroTan View the latest post
    December 31st 2020, 5:53pm
  •  
    9
    20
    Last post by AstroSafari.com View the latest post
    January 27th 2021, 4:32am

Re: Error Codes 15 and 44

Postby Leeann_93 » December 3rd 2019, 2:25am

Coolant temp sensor - for the ECM, not the gauge - was replaced? Are you sure the correct sensor was replaced? There are two: one for the gauge, one for the computer.

44 means O2 sensor is reporting a lean condition, which can be caused by the ECM not receiving correct information on engine coolant temp. It also can mean the wiring to the oxygen sensor is damaged or not making good connection with the sensor. The 15 also can mean that the wiring to the CTS is damaged or disconnected.
'05 Astro AWD vin X
'02 Astro LS AWD vin X
'00 Astro LS AWD - WIP
'99 Safari XLE AWD - broke
'93 AWD EXT vin W - real broke
User avatar
Leeann_93
Team Leader
Team Leader
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: Leeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full years
Posts: 13668
Topics: 44
Images: 17
Joined: December 2008
Location: MD
Gender: Female
Alias (AKA):
Van Model Year: 2005
Van Make/Model: Chevrolet Astro
Extra Info: LS AWD

Re: Error Codes 15 and 44

Postby SWeaver724 [OP] » December 3rd 2019, 2:50am

I changed the coolant temp sensor on the front of the engine, the one next to the upper radiator hose! I may try to change it again since it is under warranty still
Original Poster [OP]
SWeaver724
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: SWeaver724 has been a member for 1 full year
Posts: 3
Topics: 1
Joined: December 2019
Gender: Male
Alias (AKA): Sean
Van Model Year: 1995
Van Make/Model: GMC Safari
Extra Info: 4.3L RWD

Re: Error Codes 15 and 44

Postby SWeaver724 [OP] » December 3rd 2019, 2:58am

It’s just odd that it only does it after it’s heated up if I’m on the highway it’s fine but as soon as I slow down or stop it starts acting up!
Original Poster [OP]
SWeaver724
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: SWeaver724 has been a member for 1 full year
Posts: 3
Topics: 1
Joined: December 2019
Gender: Male
Alias (AKA): Sean
Van Model Year: 1995
Van Make/Model: GMC Safari
Extra Info: 4.3L RWD

Re: Error Codes 15 and 44

Postby Leeann_93 » December 3rd 2019, 2:59am

Moved to Engines
'05 Astro AWD vin X
'02 Astro LS AWD vin X
'00 Astro LS AWD - WIP
'99 Safari XLE AWD - broke
'93 AWD EXT vin W - real broke
User avatar
Leeann_93
Team Leader
Team Leader
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: Leeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full yearsLeeann_93 has been a member for 12 full years
Posts: 13668
Topics: 44
Images: 17
Joined: December 2008
Location: MD
Gender: Female
Alias (AKA):
Van Model Year: 2005
Van Make/Model: Chevrolet Astro
Extra Info: LS AWD

Re: Error Codes 15 and 44

Postby Big_kid » December 3rd 2019, 3:23am

The sensor you changed IS the one for the computer. The one in the driver side head is for the gauge.

I would chase down the 15 first. If the computer sees a temperature reading warmer than the actual temperature, it would cause a lean condition. There should be a ground wire very close to/on the thermostat housing and coolant temperature sensor. Make sure it was reinstalled, and is clean. Take a meter to the ground wire while moving it around to make sure it isn't broken/intermittent. You can do the same to the wires going to the computer. It is located behind the front passenger kick panel. A year ago I knew the pin numbers and which plug off the top of my head. A quick poke on the autozone website shows Black and yellow, pins B3 (black) and B8 (yellow) per the autozone website wiring diagram:
https://www.autozone.com/repairinfo/rep ... 52800a824a



Lifted from another forum I found when I was battling my code 15 after my swap:

https://www.chevytalk.org/fusionbb/show ... tid/176155

15 - Coolant Sensor Circuit - Excessive Low temperature indicated

To test the coolant sensor, unplug the wire connector and test the resistance across the two terminals of the SENSOR with an ohm meter.

The sensor screws into the intake manifold, on the front passenger side, by the thermostat housing.

Coolant sensor approximate resistance specifications:
177 ohms @ 212 deg. F. or 100 deg. C.
241 ohms @ 194 deg. F. or 90 deg. C.
332 ohms @ 176 deg. F. or 80 deg. C.
467 ohms @ 158 deg. F. or 70 deg. C.
667 ohms @ 140 deg. F. or 60 deg. C.
973 ohms @ 122 deg. F. or 50 deg. C.
1188 ohms @ 113 deg. F. or45 deg. C.
1459 ohms @ 104 deg. F. or 40 deg. C.
1802 ohms @ 95 deg. F. or 35 deg. C.
2238 ohms @ 86 deg. F. or 30 deg. C.
2796 ohms @ 77 deg. F. or 25 deg. C.
3520 ohms @ 68 deg. F. or 20 deg. C.
4450 ohms @ 59 deg. F. or 15 deg. C.
5670 ohms @ 50 deg. F. or 10 deg. C.
7280 ohms @ 41 deg. F. or 5 deg. C.
9420 ohms @ 32 deg. F. or 0 deg. C.
12300 ohms @ 23 deg. F. or -5 deg. C.
16180 ohms @ 14 deg. F. or -10 deg. C.
21450 ohms @ 5 deg. F. or -15 deg. C.
28680 ohms @ -4 deg. F. or -20 deg. C.
52700 ohms @ -22 deg. F. or -30 deg. C.
100700 ohms @ -40 deg. F. or - 40 deg. C.


Let us know what you find.
95 Astro Conversion of unknown irrelevant lineage
We have enough youth. How about a fountain of smart?
User avatar
Big_kid
Team Leader
Team Leader
Firing on 7 Cylinders (L7)
Firing on 7 Cylinders (L7)
Years of Membership: Big_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full yearsBig_kid has been a member for 12 full years
Posts: 6772
Topics: 185
Images: 339
Joined: June 2008
Gender: Male
Alias (AKA):
Van Model Year: 1995
Van Make/Model: Chevrolet Astro
Extra Info: 2WD 5.7 V8

Re: Error Codes 15 and 44

Postby dramey » December 4th 2019, 6:03am

When my engine coolant sensor went bad, I found it using my scan tool. The engine coolant sensor was telling the computer that the coolant was -40F when the outside air temperature was in the 60’s or 70’s.
User avatar
dramey
Firing on 7 Cylinders (L1)
Firing on 7 Cylinders (L1)
Years of Membership: dramey has been a member for 4 full yearsdramey has been a member for 4 full yearsdramey has been a member for 4 full yearsdramey has been a member for 4 full years
Posts: 782
Topics: 14
Joined: September 2016
Location: Alaska
Gender: Male
Alias (AKA):
Van Model Year: 1997
Van Make/Model: Chevrolet Astro
Extra Info: AWD Cargo Van


 
  • Related topics
    Replies
    Views
    Last post

Return to Engines

It is currently January 27th 2021, 4:32am

Engines Forum
Engine Repairs, Modifications, Diagnostics, Tuning, Upgrading, Questions.

<a href="https://ad.doubleclick.net/ddm/trackclk/N8334.275400VERTICALSCOPEINC./B20209277.204028354;dc_trk_aid=407011718;dc_trk_cid=94070067;dc_lat=;dc_rdid=;tag_for_child_directed_treatment="target="_blank"><img src="https://tpc.googlesyndication.com/pagead/imgad?id=CICAgKDrrqWwMRCAARgcKAEyCN4sAjjtai4k" border="0" align="right">
<IMG SRC="https://ad.doubleclick.net/ddm/trackimp/N8334.275400VERTICALSCOPEINC./B20209277.204028354;dc_trk_aid=407011718;dc_trk_cid=94070067;ord=;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement">
Moderator: chevy57bert
To create a new topic in Engines, click this button:
Previous topic Next topic
Recent Image Attachments
Attached by:
Attached by: Mmusicman
Mmusicman
in Engines
Views: 142
Comments: 10
Date: Jan 23 '21
Time: 4:14am
» Read last comment
Attached by:
Attached by: stent
stent
in Engines
Views: 312
Comments: 8
Date: Jan 10 '21
Time: 7:37pm
» Read last comment
Attached by:
roachmon
in Engines
Views: 312
Comments: 8
Date: Jan 10 '21
Time: 4:04am
» Read last comment
Attached by:
roachmon
in Engines
Views: 312
Comments: 8
Date: Jan 09 '21
Time: 6:34am
» Read last comment
Attached by:
OldSchoolNoe
in Engines
Views: 323
Comments: 9
Date: Jan 01 '21
Time: 8:46pm
» Read last comment
Sponsors

Who is online

Users browsing this forum: co60co60 is online!, Yandex [Bot] and 30 guests