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Author Topic: DTC U0073  (Read 3743 times)

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Offline 2kwk4u

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DTC U0073
« on: November 21, 2011, 03:17:35 PM »
Anyone seen this one yet?  My check engine light came on today.  Pulled the code w/ my DashDAQ, and this was it.  "Control module communication bus A off"

I cleared the code and drove it home.  No other DTCs were set or pending.  I'll post in this thread again if anything becomes of it... just curious if anyone else has seen this one before...

Offline Critterman

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Re: DTC U0073
« Reply #1 on: November 21, 2011, 04:08:31 PM »
From the world wide web (a Saturn site)

A U0073 isn't just a BCM code. Almost any of the vehicles systems can cause it.

The manual says the following modules can set a U0073:

BCM, DRR, EBCM, ECM, HVAC IPC, PSCM, Radio, RCDLR, RSA, SDM, TCM, TDM, and VCIM.

Could be somethig as simple as a loose electrical connector, low voltage situation, blown fuse or complete failure of one of the modules.

Gonna need a GM TEC2 to figure this one out.
GONE: (but not forgotten) 2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
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Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension

JPM
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Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
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Offline 2kwk4u

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Re: DTC U0073
« Reply #2 on: November 21, 2011, 05:09:16 PM »
Yea... I'll see if it ever comes back first :lol:

Offline scanner

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Re: DTC U0073
« Reply #3 on: November 21, 2011, 05:35:27 PM »
From the world wide web (a Saturn site)

A U0073 isn't just a BCM code. Almost any of the vehicles systems can cause it.

The manual says the following modules can set a U0073:

BCM, DRR, EBCM, ECM, HVAC IPC, PSCM, Radio, RCDLR, RSA, SDM, TCM, TDM, and VCIM.

Could be somethig as simple as a loose electrical connector, low voltage situation, blown fuse or complete failure of one of the modules.

Gonna need a GM TEC2 to figure this one out.

Right On the Money!
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Offline Critterman

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Re: DTC U0073
« Reply #4 on: November 21, 2011, 10:23:19 PM »
so take that Scott!  :)
GONE: (but not forgotten) 2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

Offline 2kwk4u

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Re: DTC U0073
« Reply #5 on: November 21, 2011, 10:44:31 PM »
so take that Scott!  :)

Uh, thanks?  :idk:  I totally couldn't figure out how to use google  :kwh:

Offline Critterman

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Re: DTC U0073
« Reply #6 on: November 22, 2011, 11:14:10 AM »
I knew that, that's why I helped.  :)
GONE: (but not forgotten) 2006 Cool named BIXABEL (BISH-AH-BEL) Mayan for "Good Roads"

DDM
StageIII intercooled Supercharger, Wisco ceramic coated pistons, Carrillo rods, superTech valves and Springs
Ported and polished head
Exedy Stage II Clutch
big brake kit, slotted/drilled Rotors w/Porterfield pads & blue juice
Backbone, Probeam, Cross Strut Brace
Underhood, trunk, & door Lights
ZOK suspension

JPM
Center console, door inserts, & dash
Seat bolster & lumbar support

Focuztech Tri-Y Header & hi-flow cat
Solo Performance SQR-2
Norm's Rear facia
Heated Seats
Black Cat inserts

Offline miller11386

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Re: DTC U0073
« Reply #7 on: November 22, 2011, 01:27:09 PM »
not going to lie, but now that I have HPT, I dont even worry about codes until they set a few times and consistently return under the same conditions.
Check out Miller's Youtube Channel HERE

Offline 2kwk4u

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Re: DTC U0073
« Reply #8 on: November 23, 2011, 07:34:37 PM »
Hasn't set a CEL again, so I'm not worrying about it for now...

 

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