C003B on Jeep: How to Diagnose & Fix
Right Rear Wheel Speed Sensor Supply Circuit
1 Jeep model · 1 documented issue · 1 critical · $250-$1,200 repair
C003B on Jeep by model: symptoms, diagnosis and fix
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.
Common Symptoms
- ABS light on
- ESC/traction control light on
- Cruise control disabled
- Brake pedal pulsation changes or ABS inoperative message
- Intermittent warnings that reset after key cycle
How to Fix
Scan for ABS module faults, inspect wheel speed sensors and wiring at each hub, and check tone rings/encoder surfaces for damage or contamination. Replace the affected wheel speed sensor/hub assembly as needed and clear codes; verify with a road test and live wheel-speed data.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 68609615AA front-left wheel-speed sensor with auto levelOEMMopar 68609615AA
Front-left sensor replacement after live data and circuit inspection isolate that corner on an auto-level vehicle Fitment/availability: 2022-2025 Grand Wagoneer, driver-side front, with auto level. Not the passenger side, rear axle or wi…
- Genuine Mopar 68609616AA front-right wheel-speed sensor with auto levelOEMMopar 68609616AA
Front-right sensor replacement after live data and circuit inspection isolate that corner on an auto-level vehicle Fitment/availability: 2022-2024 Grand Wagoneer, passenger-side front, with auto level. Not the driver side, rear axle or w…
- Genuine Mopar 68424418AD front wheel-speed sensor without auto levelOEMMopar 68424418AD
Front sensor replacement after diagnosis on a vehicle confirmed not to have auto level Fitment/availability: 2022 Grand Wagoneer front left or right without auto level according to the exact catalog. Confirm VIN and later-year supersessi…
- Genuine Mopar 68422140AA front hub-and-bearing assemblyOEMMopar 68422140AA
Confirm VIN/current supersession and do not use for an isolated sensor/wiring fault or rear axle.
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Sources for this issue (1)
C003B code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C003B mean on a 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 it is documented across 1 model: Grand Wagoneer.
What are the most common causes of C003B?
The most common causes of C003B are: 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. The specific cause varies by vehicle.
How much does it cost to fix C003B on a Jeep?
Published repair estimates on Jeep range from $250 to $1,200 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for C003B on a different make?
View C003B across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.