I have a 2007 Saturn relay. The check engine light shows need to replace the ABC, tractionsupport,and suspension control needs to have both front sensors replaced. Did this twice within two months.

P0685 SATURN Engine Control Module Power Relay Control Circuit Open (autocodes.com)
P0685 ECM/PCM Power Relay Control Circuit Open (obd-codes.com)
Saturn VUE (2005 - 2007) - fuse box diagram - Auto Genius

Hope info helps

the usual problem with air suspension on the x350 all alloy car is the air pump or corroded wiring to it, its behind the lh of the front bumper liner if you got a air suspension problem showing you need to get the fault codes out of the system to help sort it out it may be a air leak the, the resovoir is in the boot well.and i think the relays and module is in the boot area/ fusebox cars these days are not all that easy to fix without special tools or franchise dealer help good luck

You need to have the air suspension control module fault codes read to see what diagnostics should be run to determine cause.

sounds like you will need to replace the indicator relay, normally found in the fuse box

That could work , You mite be able to test the sensor in question with ohm meter . Test the front one an see what the resistance is ,then check the back one. I don't know what it should be with out looking it up in the service info . You could also check to see if the sensor is getting power from the control module , an see if there is a return input to the module .
There are a few DTC'S this able to set !
Air Suspension Control Module Diagnostic Trouble Code (DTC) Index
Air Suspension Control Module Diagnostic Trouble Code (DTC) Index DTCs Description Source Action B1318 Battery Voltage Low Air Suspension Control Module Go To Pinpoint Test C . B1342 Air Suspension Control Module Air Suspension Control Module INSTALL a new air suspension control module. REFER to Module-Air Suspension Control . SET the front ride height. REFER to Air Suspension Initialization (Clear DTC B2140). CLEAR the DTCs. REPEAT the self-test. B1485 Brake Pedal Input Circuit Battery Short Air Suspension Control Module RERUN On-Demand Self-Test. MAKE SURE that the brake pedal is not pressed. If DTC is returned again, REPAIR brake pedal position (BPP) circuitry. B1566 Door Ajar Circuit Short to Ground Air Suspension Control Module Go To Pinpoint Test D . B2140 Initialization Failure (Vehicle Ride Height Not Programmed) Air Suspension Control Module REFER to Air Suspension Initialization (Clear DTC B2140). C1439 Vehicle Acceleration EEC-V Circuit Failure Air Suspension Control Module Go To Pinpoint Test E . C1724 Air Suspension Height Sensor Power Circuit Failure Air Suspension Control Module Go To Pinpoint Test F . C1726 Air Suspension Pneumatic Failure Air Suspension Control Module Go To Pinpoint Test G . C1760 Air Suspension Height Sensor High Signal Circuit Failure Air Suspension Control Module Go To Pinpoint Test H . C1770 Air Suspension Vent Solenoid Output Circuit Failure Air Suspension Control Module Go To Pinpoint Test I . C1790 Air Suspension LR Air Spring Solenoid Output Circuit Failure Air Suspension Control Module Go To Pinpoint Test J . C1795 Air Suspension RR Air Spring Solenoid Output Circuit Failure Air Suspension Control Module Go To Pinpoint Test K . C1830 Air Suspension Compressor Relay Circuit Failure Air Suspension Control Module Go To Pinpoint Test L . C1917 Steering Electronic Variable Orifice (EEVO) Out-of-Range Fault Air Suspension Control Module Go To Pinpoint Test Q .

• Uneven vehicle height

• Circuitry.
• Rear pneumatic fault.
• Air compressor assembly.
• Air suspension control module.

• Go To Pinpoint Test I .

Thermostat is where the lower radiator hose attaches to the engine. The lower front passenger side of the engine.

WHAT IT MEANS YOUR FAN CONTROL RELAY CONTROL CIRCUIT IS OPEN OR SHORTED TO GROUND. FAN CONTROL RELAY CONTROL CIRCUIT IS SHORTED TO SYSTEM POWER. THE FAN CONTROL RELAY POWER CIRCUIT IS OPEN CHECK COOL FAN 1 FUSE. FAN CONTROL RELAY IS DAMAGED OR HAS FAILED. PCM HAS FAILED.I LISTED ALL POSSIBLE CAUSES TO CODE PO480.

Clean Forward Looking Camera Clean windshield behind the camera cover Inspect Battery Battery & auxiliary battery if applicable, check and correct fluid level; check battery condition using "Midtronics MCR 717" tester. Brake Fluid Brakes and Traction Control Check thickness of front/rear brake pads. Check condition/thickness of front/rear brake discs. Inspect lines and hoses for signs of chafing, leakage or damage. Cooling System Engine cooling system, antifreeze and corrosion protection. Check lines and hoses for signs of chafing or damage. Drive Belt Check condition of poly-V-Belt Drive/Propeller Shaft Inspect condition of flexible disks. Fluids Leakage - Major components. (Underside of vehicle and engine compartment) Check for chafe marks, line routing, damaged components. Hood Check catch, safety catch and hinges on engine hood for proper operation. Lighting and Horns Horn, high beam flasher, hazard warning flashers, turn signals, warning/indicator lamps, illumination, interior/exterior lighting, front/rear lamps. Check trunk/rear cargo area lighting, if applicable Parking Brake System Check parking brake [function test only] Power Steering Fluid Seat Belt Systems Check seat belts and buckles for signs of external damage and proper function. Steering Inspect play of tie rod and drag link joints, inspect rubber boots. Suspension Check condition of front axle ball joints and rubber boots. Suspension Fluid (Active Body Control (ABC)) Tires Check TIREFIT tire sealant expiration date; if equipped Inspect tires for damage and splits, measure tread depth. Correct tire inflation pressure, including spare if equipped. Washer Fluid Wiper Blade Wiper and Washer Systems Windshield wipers/washer system. Headlamp cleaning system and rear window wiper/washer system if applicable. Inspect/Adjust Headlamp Check and correct headlamp setting. Replace Air Filter Element Every 52,000 miles or 4 years. Cabin Air Filter (Combination filter) Every 26,000 miles or 2 years. Engine Oil Oil Filter, Engine Reset Service Reminder Indicators

thanks

Auto part stores rarely even carry lower control arms for anything. If you need one your best bet is either the dealer or a local salvage yard, considering the age you should be able to find one in very good condition. Also check ebay I just found 2 drivers side ones there. Saturn Ion, Pontiac pursuit, and Pontiac G5 also use the same control arm. Depending on suspension option. check this link I found on ebay http://cgi.ebay.com/ebaymotors/2007-SATURN-ION-FRONT-LOWER-CONTROL-ARM-RH_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQhashZitem4cea7ab3a7QQitemZ330351424423QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

When shopping for a Saturn Relay, i recommend trying to get a model with the 3.9-liter V6. This engine offers commendable performance around town and made quick work of merging and passing on freeways. The Relay's suspension is on the soft side, delivering a smooth ride and average handling for this class. If upgrading to the optional sport suspension, it provided tighter handling, though maneuverability in tight spaces was still compromised by the van's large turning radius.