What Does C0615 Mean?
This code indicates the ABS/stability control module has detected a fault in the left front wheel speed sensor or its associated position sensor circuit. The sensor may be providing an implausible signal, no signal at all, or intermittent data that doesn't correlate with other wheel speed inputs. This affects the vehicle's anti-lock braking system, traction control, and electronic stability control functionality.
Common Causes
45%
Faulty left front wheel speed sensor or damaged tone ring
30%
Damaged, corroded, or disconnected sensor wiring and connectors
15%
Excessive wheel bearing play or worn hub bearing assembly
10%
ABS control module internal fault or corrosion
Diagnostic Steps
1
Step 1: Perform visual inspection of left front wheel speed sensor and wiring harness for physical damage, corrosion, or disconnection. Check connector pins for bent/corroded terminals and verify secure connection.
2
Step 2: Measure sensor resistance using a multimeter at the sensor connector (typical range 800-1400 ohms depending on sensor type). For active sensors, check supply voltage (typically 12V) and ground circuit integrity.
3
Step 3: Inspect the ABS tone ring on the CV axle or hub assembly for missing teeth, cracks, debris buildup, or damage. Check air gap between sensor tip and tone ring (typically 0.020-0.050 inches).
4
Step 4: Jack up the vehicle safely and check left front wheel bearing for excessive play by grasping tire at 12 and 6 o'clock positions and rocking. Any movement indicates bearing wear affecting sensor operation.
5
Step 5: Use scan tool live data to monitor left front wheel speed sensor signal while manually rotating the wheel. Compare signal pattern and frequency to other wheel sensors for consistency.
6
Step 6: Clear codes, perform test drive at speeds above 15 mph while monitoring live data. Verify repair by confirming all wheel speed sensors report similar values during acceleration, deceleration, and turning.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
This code indicates the ABS/stability control module has detected a fault in the left front wheel speed sensor or its associated position sensor circuit. The sensor may be providing an implausible signal, no signal at all, or intermittent data that doesn't correlate with other wheel speed inputs. Th...
The most common cause of C0615 (Left Front Position Sensor Malfunction) is: Faulty left front wheel speed sensor or damaged tone ring
Typical repair costs for C0615 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is drivable but ABS, traction control, and stability control systems will be disabled or limited, resulting in reduced braking performance on slippery surfaces and loss of electronic stability assistance. Repair should be completed promptly, especially before driving in adverse weather conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0615 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Braking System (ABS) / Stability Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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