C1238 on Toyota
Manufacturer-Specific Chassis/ABS Code
C1238 on Toyota vehicles indicates manufacturer-specific chassis/abs code. Au7o has documented this code across 1 Toyota model — most commonly on Tacoma. C1238 is a manufacturer-specific chassis/ABS trouble code whose meaning varies by maker; reported definitions include a wheel-speed sensor malfunction, an ABS hydraulic pressure differential switch input circuit failure, and a brake thermal model condition. In general it indicates that the ABS/stability control module detected a fault in a circuit or condition it monitors. Setting this code typically affects ABS and traction/stability control and lights the related warnings. Confirm the precise definition for your specific make and model with a capable scan tool or factory service manual before replacing components. Typical repair costs on Toyota range from $350 to $1,200, depending on the specific model and root cause.
Common Causes of C1238
- •Faulty wheel speed sensor or damaged tone ring
- •ABS pressure differential / brake-related switch fault
- •Wiring or connector damage / corrosion
- •Open or short circuit in the affected circuit
- •ABS/stability control module fault
- •Poor ground or low system voltage
C1238 on Toyota by Model
Toyota Tacoma(1 issue)
- Front Wheel Bearing and Hub Wear Causing Humming Noise and ABS Concerns2005-2015
Second-generation Tacoma owners frequently report front wheel bearing wear that starts as a low humming or growling noise and can progress to looseness, vibration, and ABS sensor issues because the sensor tone ring is integrated with the hub assembly. Heavier tires, off-road use, and added front-end load appear to accelerate failure on some trucks. The issue is widely discussed in Tacoma forums and commonly seen in repair shops.
Looking for C1238 on a different make?
View C1238 across all makes →Frequently Asked Questions
What does C1238 mean on Toyota?▼
C1238 stands for "Manufacturer-Specific Chassis/ABS Code." C1238 is a manufacturer-specific chassis/ABS trouble code whose meaning varies by maker; reported definitions include a wheel-speed sensor malfunction, an ABS hydraulic pressure differential switch input circuit failure, and a brake thermal model condition. In general it indicates that the ABS/stability control module detected a fault in a circuit or condition it monitors. Setting this code typically affects ABS and traction/stability control and lights the related warnings. Confirm the precise definition for your specific make and model with a capable scan tool or factory service manual before replacing components. On Toyota specifically, this code is documented across 1 model.
What causes C1238 on Toyota vehicles?▼
Common causes on Toyota: Faulty wheel speed sensor or damaged tone ring, ABS pressure differential / brake-related switch fault, Wiring or connector damage / corrosion, Open or short circuit in the affected circuit, ABS/stability control module fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1238 on a Toyota?▼
Repair costs on Toyota range from $350 to $1,200, depending on the specific model and root cause.
Which Toyota models have C1238 documented?▼
Au7o has documented C1238 on 1 Toyota model: Tacoma.