What Does C0587 Mean?
This code indicates that the ABS/stability control module has detected a voltage level in the left rear wheel solenoid circuit that is below the normal operating range. The solenoid controls hydraulic pressure to the left rear brake caliper during ABS or traction control events. The module detected either a short to ground, excessive resistance, or an open circuit in the solenoid valve or its wiring.
Common Causes
35%
Damaged wiring harness or corroded connector pins between ABS module and left rear wheel speed sensor/solenoid valve
30%
Failed left rear ABS solenoid valve inside the hydraulic control unit
20%
Short to ground in left rear solenoid circuit wiring
10%
Corroded or damaged ABS module connector causing high resistance
5%
Failed ABS control module internal driver circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the left rear ABS harness from the module to the wheel hub area, checking for chafed wires, damaged insulation, corrosion at connectors, or moisture intrusion. Pay special attention to areas where the harness passes through body openings or near moving suspension components.
2
Step 2: With ignition off, disconnect the ABS module connector and the left rear solenoid connector. Using a digital multimeter, measure resistance from the ABS module connector solenoid control pin to ground. Reading should be infinite (open circuit). If less than 10k ohms, locate and repair the short to ground.
3
Step 3: Measure resistance across the left rear solenoid valve terminals (with both ends disconnected). Typical specification is 3-7 ohms. If reading is infinite (open) or significantly out of range, the solenoid valve has failed and the hydraulic control unit requires replacement or rebuild.
4
Step 4: Check voltage supply to the solenoid circuit with ignition on. Verify battery voltage is present at the supply side of the solenoid. If voltage is absent, check fuses and relay associated with the ABS system.
5
Step 5: Inspect ABS module connector for bent pins, corrosion, or signs of water intrusion. Clean connectors with electrical contact cleaner and apply dielectric grease. Wiggle test the harness while monitoring live data to identify intermittent connections.
6
Step 6: After repairs, clear codes, perform an ABS system functional test by driving the vehicle at 15-25 mph and performing controlled braking to verify ABS pulses normally. Re-scan for codes to confirm repair success.
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
This code indicates that the ABS/stability control module has detected a voltage level in the left rear wheel solenoid circuit that is below the normal operating range. The solenoid controls hydraulic pressure to the left rear brake caliper during ABS or traction control events. The module detected ...
The most common cause of C0587 (Left Rear Solenoid Circuit Low) is: Damaged wiring harness or corroded connector pins between ABS module and left rear wheel speed sensor/solenoid valve
Typical repair costs for C0587 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is drivable but ABS/traction control functionality for the left rear wheel will be disabled or degraded, which may result in wheel lockup during hard braking on slippery surfaces. Repair should be completed promptly, especially before winter or wet weather driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0587 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS) / Electronic Stability Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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