C003B on Jeep
Right Rear Wheel Speed Sensor Supply Circuit
C003B on Jeep vehicles indicates right rear wheel speed sensor supply circuit. Au7o has documented this code across 1 Jeep model — most commonly on Grand Wagoneer. This chassis code relates to the supply/circuit feeding the right rear wheel speed sensor used by the ABS and stability systems. The control module detected a problem with the power supply or signal circuit to that sensor, meaning it may not be receiving valid wheel-speed data from the right rear corner. Because ABS, traction control, and stability control all rely on accurate wheel speed signals, those systems may be partially or fully disabled while this code is active. Base braking still works, but the safety electronics may not. Typical repair costs on Jeep range from $250 to $1,200, depending on the specific model and root cause.
Common Causes of C003B
- •Faulty right rear wheel speed sensor
- •Damaged or corroded sensor wiring/connector
- •Open or short in the sensor supply circuit
- •Debris or rust at the sensor mounting/tone ring
- •Damaged tone (reluctor) ring
- •Corrosion at the ABS module connector
- •Failed wheel bearing integrated with the sensor
C003B on Jeep by Model
Jeep Grand Wagoneer(1 issue)
- Electronic Stability Control/ABS warning with wheel speed sensor or tone ring faults2022-2024
NHTSA complaints and owner reports describe intermittent ABS/ESC warnings on Grand Wagoneer tied to wheel speed sensor signal loss or erratic readings, sometimes after wet weather or road debris impacts. When the system detects implausible wheel speed data, it can disable ABS/ESC functions and illuminate multiple warnings.
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What does C003B mean on Jeep?▼
C003B stands for "Right Rear Wheel Speed Sensor Supply Circuit." This chassis code relates to the supply/circuit feeding the right rear wheel speed sensor used by the ABS and stability systems. The control module detected a problem with the power supply or signal circuit to that sensor, meaning it may not be receiving valid wheel-speed data from the right rear corner. Because ABS, traction control, and stability control all rely on accurate wheel speed signals, those systems may be partially or fully disabled while this code is active. Base braking still works, but the safety electronics may not. On Jeep specifically, this code is documented across 1 model.
What causes C003B on Jeep vehicles?▼
Common causes on Jeep: Faulty right rear wheel speed sensor, Damaged or corroded sensor wiring/connector, Open or short in the sensor supply circuit, Debris or rust at the sensor mounting/tone ring, Damaged tone (reluctor) ring. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C003B on a Jeep?▼
Repair costs on Jeep range from $250 to $1,200, depending on the specific model and root cause.
Which Jeep models have C003B documented?▼
Au7o has documented C003B on 1 Jeep model: Grand Wagoneer.