C0038 on Volkswagen: How to Diagnose & Fix
Left Rear Wheel Speed Sensor Circuit
1 Volkswagen model · 1 documented issue · 1 critical · $150-$1,200 repair
C0038 on Volkswagen by model: symptoms, diagnosis and fix
Complaint data show a recurring pattern of ABS warning lights, chimes, and unexpected ABS activation at low speeds, sometimes causing longer stopping distances or abrupt brake behavior. The issue is reinforced by a recall covering short circuits within the ABS electronic control unit on certain early Jettas.
Common Symptoms
- ABS warning light and warning chime
- ABS activates at very low speed on dry pavement
- Brake pedal pulsates unexpectedly
- Longer stopping distance near a stop
- Traction control or brake warnings accompany ABS fault
How to Fix
Diagnosis should include scanning the ABS module, checking wheel speed sensor signals, and evaluating the ABS control module for internal faults. Repairs range from wheel speed sensor replacement to ABS module repair or replacement, with brake hydraulic inspection if the pedal behavior is abnormal. Costs typically range from $150 for a sensor issue to $1,200 for module replacement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Bosch 0986594001 front-left ABS wheel-speed sensor
replace a graph- and circuit-tested failed front-left wheel-speed sensor causing signal dropout Fitment/availability: Bosch application catalog covers 1993-2005 Volkswagen Jetta; 68-mm front-left sensor cross-references 1J0927803, so con…
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Owner tips & cautions
- TipIf ABS activates below 10 mph on dry roads, inspect wheel speed sensor tone rings and sensor readings before replacing major brake parts.
- TipPersistent ABS and brake warnings after sensor checks often point to an internal ABS module fault.
C0038 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 C0038 mean on a Volkswagen?
C0038 stands for "Left Rear Wheel Speed Sensor Circuit." C0038 is a chassis/brake code indicating a fault in the left rear wheel speed sensor circuit (often specifically the sensor's supply/voltage portion of the circuit). The ABS module needs this sensor's signal for anti-lock braking, traction control, and stability control, and sets the code when the circuit is open, shorted, or out of range. The ABS and stability/traction lights usually illuminate and those systems may be disabled, while ordinary braking typically continues to function. On Volkswagen it is documented across 1 model: Jetta.
What are the most common causes of C0038?
The most common causes of C0038 are: Failed left rear wheel speed sensor, Damaged supply/signal wiring or chafed harness, Corroded or loose sensor connector, Damaged or contaminated tone/reluctor ring, Blown fuse or open in the sensor supply circuit, ABS control module fault. The specific cause varies by vehicle.
How much does it cost to fix C0038 on a Volkswagen?
Published repair estimates on Volkswagen range from $150 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 C0038 on a different make?
View C0038 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.