Control module code $7EA - 2004 Cadillac CTS

Chevy Mechanic:
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They are what they call "generic" codes. Some OBD11 or OBD2, "same thing", generic reades will give a $7E8 and $7EA. together and maybe a $7E9.
These are for a submenu. Click on each one separately and you should or might get a regular "P0" code if your scanner
has the supported module. If not either get a better scanner

Those are typically ECU addresses...... 7EA and 7EB are response addresses HVECU and the Traction Battery

// ECUs
// -- request/response
// -- 7E0/7E8 for ECM (engine control module);
// -- 7E1/7E9 for TCM (transmission control module).
// -- 7E2/7EA for HVECU (Hybrid contol module)
// -- 7E3/7EB for Traction Battery
// -- 7E4/7EC
// -- 7E5/7ED
// -- 7E6/7EE
// -- 7E7/7EF

these are not codes read your manual on how to use your scanner ---recheck codes and keep going to next step after what you gave as code those just show that codes were present

Those codes mean the reader you are using is the wrong one. Make sure it is CAN OBD 2

These are not trouble codes, instead they direct you to components that need to be looked at. Basically, the control module menus and both codes represent something. The 7e8 represents the engine powertrain, while the 7e9 represents the transmission powertrain.

Those are not valid fault codes. the would look like this PXXXX "X" being a number.

7E8 and or 7EA Trouble Codes Chevy HHR Network da

Honestly, no idea acout Saturn Aura's error codes.
But, looks to me that those two mechanics you called are not really very efficient,
Guess you should look for a GOOD mechanical service and get your car's computer scanned by someone who really knows how to use a scanner,

Seems to be a scanner component ID, not the OBD2 fault code.
You need to learn to use the scanner and interpret the readings (usually the scanner manual contains the meanings to these codes)

Otherwise you need to take the car to an independent service with Chevrolet specific scan tools or a Chevrolet dealer, for proper diagnostics.

That is what they call a "generic" code. Some OBD11 or OBD2, "same thing", scanners will give a $7E8 and $7EA. together and maybe a $7E9.
These are for a sub menu. Click on each one separately and you should or might get a regular "P0" code if your scanner
has the supported module. If not either get a better scanner or
go to a "big box" auto parts store and they will scan it for free and
should be able to give you more information.
Please comment or feedback if helpful.
Larry