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Deville DHS
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21 Posts
Discussion Starter #1
So, I finally pulled all the codes stored in 2001 today. I know for a fact we have a problem with the rear HVAC system, balance between the drivers/pass side temp, rear lumbar and front drivers seat heating.

Below are the codes I pulled from the Caddy. can anyone shed light on what these are potentially pointing to?

B0159
B0164
B0174
B0179
B0184
B0189
B0429 (current)
B0510
B0515
B0520
B1004
B2556
B2641
B2646
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
Can't tell you anything without the definitions. There's a link to code definitions within the sticky thread on how to pull codes.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
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19,265 Posts
So, I finally pulled all the codes stored in 2001 today. I know for a fact we have a problem with the rear HVAC system, balance between the drivers/pass side temp, rear lumbar and front drivers seat heating.

Below are the codes I pulled from the Caddy. can anyone shed light on what these are potentially pointing to?

B0159
B0164
B0174
B0179
B0184
B0189
B0429 (current)
B0510
B0515
B0520
B1004
B2556
B2641
B2646
===========================
go here for the definitions -
http://www.cadillacfaq.com/faq/answers/dtccode.html
 

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Registered
Deville DHS
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21 Posts
Discussion Starter #4
Sorry guys...should have thought of that...


DTC B0159 Outside Air Temperature Sensor Circuit Range/Performance
DTC B0164 Passenger Compartment Temperature Sensor #1 (Single Sensor or LH) Circuit Range/Performance
DTC B0174 Output Air Temperature Sensor #1 (Upper; Single or LH) Circuit Range/Performance
DTC B0179 Output Air Temperature Sensor #2 (Lower; Single or LH) Circuit Range/Performance
DTC B0184 Solar Load Sensor #1 CKT Range
DTC B0189 Solar Load Sensor #2 CKT Range
DTC B0429 Temperature Control #3 Rear Circuit Range/Performance
DTC B0510 RH Panel Discharge Temp Sensor Failure
DTC B0515 RH Heater Discharge Temp Sensor Failure
DTC B0520 Rear Discharge Temp Sensor Failure
DTC B1004 Keep Alive Memory (KAM)
DTC B2556 Interior Lamp Rheostat Circuit Range
DTC B2641 Delayed Exterior Lighting Ctrl CKT Range
DTC B2646 Ambient Light Sensor Circuit Range
DTC B1860 Driver Lumbar Vert Sensor CKT Malf
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,781 Posts
It's possible. After having a battery replaced under warranty I had a shit load of codes. Clear 'em and see what (if any) return, assuming of coarse that your battery is in good condition.
 

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Deville DHS
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21 Posts
Discussion Starter #8
It's possible. After having a battery replaced under warranty I had a shit load of codes. Clear 'em and see what (if any) return, assuming of coarse that your battery is in good condition.
Thanks Ranger. I know for a fact the 0429 code is legit...my rear temp controls don't do anything....so I am sure that needs to be replaced. The next item I am trying to tackle is the module that controls air temp in front between drivers and passengers. I don't use the auto mode much at all, but with both the pass and drivers either all the way hot/cold, there is a big difference in temps between each side. It seems to take forever for either to get cold with AC. I didn't see any codes pointing to a module....any idea which one it might be given the symptoms. It would be great to have a flow diagram to help pinpoint these items based on symptoms.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
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19,265 Posts
Thanks Ranger. I know for a fact the 0429 code is legit...my rear temp controls don't do anything....so I am sure that needs to be replaced. The next item I am trying to tackle is the module that controls air temp in front between drivers and passengers. I don't use the auto mode much at all, but with both the pass and drivers either all the way hot/cold, there is a big difference in temps between each side. It seems to take forever for either to get cold with AC. I didn't see any codes pointing to a module....any idea which one it might be given the symptoms. It would be great to have a flow diagram to help pinpoint these items based on symptoms.
==============================
with both the pass and drivers either all the way hot/cold,
there is a big difference in temps between each side

look at all the AC related codes you posted -

Outside Air Temperature Sensor -
Passenger Compartment Temperature Sensor #1 -
Output Air Temperature Sensor #1 -
Output Air Temperature Sensor #2 -
Solar Load Sensor #1 -
Solar Load Sensor #2 -
RH Panel Discharge Temp Sensor Failure -
RH Heater Discharge Temp Sensor Failure -
Rear Discharge Temp Sensor Failure -


your climate control system is completely confused -

it doesn't know the outside temp -

it doesn't know the cabin temp -

it can't detect the duct temps -

I'm surprised it even blows air -

-----------------------

if all these codes are "current" -
I would start looking for a faulty ground under the dash -

if all these codes are not current -

clear all the codes - and see what codes return -
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
I believe all those codes were history codes. He only noted b0429 as current.
 
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