What Does C0577 Mean?
This code indicates that the ABS/ESC control module has detected abnormally low voltage or resistance in the left front wheel speed sensor solenoid circuit, typically the ABS modulator valve solenoid. The control module continuously monitors the solenoid circuit and sets this code when circuit voltage drops below the expected threshold, indicating a short to ground, open circuit, or internal solenoid failure. This fault prevents proper operation of anti-lock braking and stability control functions for the left front wheel.
Common Causes
45%
Damaged or corroded wiring harness between ABS module and left front solenoid, including broken wires, chafed insulation causing shorts to ground, or corroded connectors
35%
Failed left front ABS inlet or outlet solenoid valve inside the hydraulic control unit due to internal short or open coil winding
15%
Corroded or loose electrical connector at the ABS hydraulic control unit causing high resistance or intermittent connection
5%
Failed ABS control module with internal driver circuit failure for the left front solenoid channel
Diagnostic Steps
1
Perform visual inspection of the left front wheel area, ABS harness routing, and ABS module connector for obvious damage, corrosion, water intrusion, or chafed wires against frame or suspension components
2
Disconnect the ABS hydraulic control unit connector and measure resistance of the left front solenoid circuit from the harness side; typical spec is 2-6 ohms; infinite resistance indicates open circuit, near-zero indicates short to ground
3
With connector still disconnected, check for continuity between the solenoid circuit wires and vehicle ground using a digital multimeter; any continuity indicates a short to ground in the harness
4
If harness tests pass, measure resistance directly at the ABS module solenoid terminals to verify solenoid coil integrity; out-of-spec readings confirm internal hydraulic unit failure
5
Inspect all connector pins for corrosion, pushed-back pins, or bent terminals; clean connections with electrical contact cleaner and apply dielectric grease before reassembly
6
Clear codes, test drive the vehicle with active ABS engagement (safe controlled braking), and verify the code does not return; monitor live data for left front solenoid command and voltage
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
This code indicates that the ABS/ESC control module has detected abnormally low voltage or resistance in the left front wheel speed sensor solenoid circuit, typically the ABS modulator valve solenoid. The control module continuously monitors the solenoid circuit and sets this code when circuit volta...
The most common cause of C0577 (Left Front Solenoid Circuit Low) is: Damaged or corroded wiring harness between ABS module and left front solenoid, including broken wires, chafed insulation causing shorts to ground, or corroded connectors
Typical repair costs for C0577 range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable with normal braking function, but ABS and traction/stability control will be disabled or operate in degraded mode. Stopping distances may increase on slippery surfaces and vehicle stability may be compromised during emergency maneuvers; repair should be completed promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0577 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS) / Electronic Stability Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
