C0577 on 2002 Cadillac Seville — Left Front Solenoid Circuit Low
1 vehicles · 1 makes
Most Reported On
C0577 is an OBD-II diagnostic trouble code meaning “Left Front Solenoid Circuit Low.” A chassis code in the SAE-defined C0xxx range (the "0" in the second position means it is a generic, not manufacturer-assigned, definition) indicating the control module measured a low-voltage or low-current condition on the left front solenoid control circuit. On most applications this solenoid lives inside the ABS hydraulic modulator and controls brake fluid flow to the left front wheel, so the module typically disables ABS/traction control and turns on the ABS warning light. Base (non-ABS) braking normally still works, but anti-lock function on that corner is lost. Because implementations differ by manufacturer, confirm against your vehicle's factory service information before replacing hardware. This code is most commonly reported on 2002 Cadillac Seville.
Common Causes
Diagnostic Tools
This is a chassis code. A basic engine-code reader will not show it — you need a scanner that reads chassis modules. These read C0577.
One caveat that applies to every scanner: only powertrain codes are standardised across manufacturers. Body, chassis and network coverage is "enhanced" diagnostics, and how deep it goes varies by make and model year — check your specific vehicle against the tool's coverage list before buying.
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Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
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What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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FAQ
What does C0577 mean?
C0577 stands for "Left Front Solenoid Circuit Low." A chassis code in the SAE-defined C0xxx range (the "0" in the second position means it is a generic, not manufacturer-assigned, definition) indicating the control module measured a low-voltage or low-current condition on the left front solenoid control circuit. On most applications this solenoid lives inside the ABS hydraulic modulator and controls brake fluid flow to the left front wheel, so the module typically disables ABS/traction control and turns on the ABS warning light. Base (non-ABS) braking normally still works, but anti-lock function on that corner is lost. Because implementations differ by manufacturer, confirm against your vehicle's factory service information before replacing hardware.
What are the most common causes of C0577?
The most common causes of C0577 are: Corroded, loose, or water-intrusion-damaged ABS module connector, Open or shorted wiring in the left front solenoid control circuit, Failed solenoid inside the ABS hydraulic control unit (usually requires modulator/HCU replacement), Failed ABS control module (EBCM) internal driver, Low system voltage or poor ground to the ABS module, Damaged harness where it routes near the left front wheel well. The specific cause varies by vehicle.
How much does it cost to fix C0577?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by C0577?
Au7o has documented C0577 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.