C1103 on Nissan
ABS/Brake System Circuit Fault (manufacturer-specific)
C1103 on Nissan vehicles indicates abs/brake system circuit fault (manufacturer-specific). Au7o has documented this code across 1 Nissan model — most commonly on Altima. This is a chassis code set by the ABS/brake control module, and its precise meaning is manufacturer-specific. On many vehicles it refers to a fault in an ABS-related circuit such as the hydraulic brake switch or a wheel-speed/control circuit, while some makes (for example certain Mercedes-Benz) assign it to a specific axle circuit. In general it indicates the ABS module found an electrical problem in a brake-system input or control circuit, which can disable anti-lock braking and stability features. Because braking-related faults affect safety, it should be diagnosed against the correct service information for the specific make. Typical repair costs on Nissan range from $250 to $700, depending on the specific model and root cause.
Common Causes of C1103
- •Faulty hydraulic brake/pressure switch (on applicable makes)
- •Wheel-speed sensor or related circuit fault
- •Damaged, corroded, or open wiring/connectors
- •Poor grounds or low supply voltage to ABS module
- •Internal ABS/EBCM module failure
- •Manufacturer-specific axle/sensor circuit fault
C1103 on Nissan by Model
Nissan Altima(1 issue)
- Front Wheel Bearing and Hub Failure Causing Humming Noise and ABS/Wheel Speed Issues2002-2012
A recurring higher-mileage Altima problem is front wheel bearing wear, often first noticed as a humming or growling noise that increases with road speed. As the bearing deteriorates, owners may feel vibration, looseness, or see ABS warnings if the integrated wheel speed signal becomes erratic. This is widely reported in repair databases and owner forums, especially on cars driven on rough roads.
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View C1103 across all makes →Frequently Asked Questions
What does C1103 mean on Nissan?▼
C1103 stands for "ABS/Brake System Circuit Fault (manufacturer-specific)." This is a chassis code set by the ABS/brake control module, and its precise meaning is manufacturer-specific. On many vehicles it refers to a fault in an ABS-related circuit such as the hydraulic brake switch or a wheel-speed/control circuit, while some makes (for example certain Mercedes-Benz) assign it to a specific axle circuit. In general it indicates the ABS module found an electrical problem in a brake-system input or control circuit, which can disable anti-lock braking and stability features. Because braking-related faults affect safety, it should be diagnosed against the correct service information for the specific make. On Nissan specifically, this code is documented across 1 model.
What causes C1103 on Nissan vehicles?▼
Common causes on Nissan: Faulty hydraulic brake/pressure switch (on applicable makes), Wheel-speed sensor or related circuit fault, Damaged, corroded, or open wiring/connectors, Poor grounds or low supply voltage to ABS module, Internal ABS/EBCM module failure. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1103 on a Nissan?▼
Repair costs on Nissan range from $250 to $700, depending on the specific model and root cause.
Which Nissan models have C1103 documented?▼
Au7o has documented C1103 on 1 Nissan model: Altima.