What Does C0376 Mean?
This code indicates the ABS/Traction Control module has detected a speed differential between the front and rear driveshaft or axle shaft speed sensors that exceeds acceptable parameters. This typically occurs in all-wheel drive or four-wheel drive vehicles where the system monitors both front and rear axle speeds to ensure proper power distribution and traction control operation. The mismatch suggests one axle is rotating at a significantly different speed than the other when it shouldn't be, compromising stability control and AWD/4WD functionality.
Common Causes
35%
Faulty wheel speed sensor or reluctor ring damage causing inaccurate speed readings from front or rear axle
25%
Transfer case malfunction or internal clutch pack slippage preventing proper torque distribution between axles
20%
Mismatched tire sizes or significant tire pressure differences between front and rear axles causing actual speed variance
12%
Differential or driveline component failure causing mechanical speed mismatch between axles
8%
ABS control module internal fault or corrupted software causing erroneous speed calculations
Diagnostic Steps
1
Step 1: Verify all four tires are the same size, type, and within 3/32 inch tread depth of each other. Check and equalize tire pressures to manufacturer specifications. Mismatched tires are a frequent cause of this code.
2
Step 2: Using live data stream, monitor individual wheel speed sensor readings at all four corners while driving the vehicle at 15-25 mph on a flat surface. All sensors should read within 2-3 mph of each other. Note any erratic, missing, or out-of-range readings.
3
Step 3: Perform visual inspection of all wheel speed sensors, wiring connectors, and tone rings/reluctor rings for damage, corrosion, debris buildup, or air gap issues. Use a multimeter to test sensor resistance (typically 800-1400 ohms) and AC voltage output during wheel rotation.
4
Step 4: Test drive vehicle and monitor transfer case engagement status (if applicable) and clutch pack operation through scan tool data. Check for transfer case fault codes or actuator malfunction indicators. Verify proper shifting between 2WD/4WD modes.
5
Step 5: Inspect transfer case fluid level and condition for contamination or metal particles indicating internal wear. Check front and rear differential fluid for similar issues that could indicate mechanical driveline problems.
6
Step 6: Clear codes and road test vehicle under various conditions (acceleration, deceleration, turns) while monitoring live shaft speed data to confirm repair. Verify ABS and traction control systems function properly without warning lights.
Estimated Repair Cost
$150 - $2,500
Parts + labor, varies by vehicle and location
This code indicates the ABS/Traction Control module has detected a speed differential between the front and rear driveshaft or axle shaft speed sensors that exceeds acceptable parameters. This typically occurs in all-wheel drive or four-wheel drive vehicles where the system monitors both front and r...
The most common cause of C0376 (Front/Rear Shaft Speed Mismatch) is: Faulty wheel speed sensor or reluctor ring damage causing inaccurate speed readings from front or rear axle
Typical repair costs for C0376 range from $150 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive at reduced speeds, but AWD/4WD functionality, traction control, and stability control may be disabled or compromised, significantly reducing control in slippery conditions. Avoid aggressive driving, poor weather conditions, and off-road use until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0376 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS) / All-Wheel Drive / Four-Wheel Drive / Traction Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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