C1252 on Toyota
Manufacturer-Specific Chassis Code (commonly ABS/Brake Pressure or Wheel Circuit)
C1252 on Toyota vehicles indicates manufacturer-specific chassis code (commonly abs/brake pressure or wheel circuit). Au7o has documented this code across 3 Toyota models — most commonly on 4Runner, Camry, Highlander. C1252 is a chassis code that is largely manufacturer-specific, so the precise definition depends on the vehicle make. It generally points to a fault within the ABS/traction/brake hydraulic control system, such as a pressure sensor, solenoid, or wheel-circuit problem detected by the ABS control module. Because chassis 'C' codes affect braking and stability systems, related warning lights (ABS/traction) often illuminate and the function may be temporarily disabled. The exact component and circuit should be confirmed with make-specific service data. Typical repair costs on Toyota range from $1,200 to $3,500, depending on the specific model and root cause.
Common Causes of C1252
- •Faulty brake/ABS pressure sensor or solenoid
- •Wheel speed sensor or related wiring fault
- •Open, short, or corrosion in the ABS circuit
- •Failing ABS/EBCM control module
- •Poor ground or low system voltage
- •Hydraulic control unit internal fault
C1252 on Toyota by Model
Toyota 4Runner(2 issues)
- ABS Actuator / Master Cylinder Assembly Failure Triggering ABS/VSC/TRAC Lights and Brake Pump Noise2003-2009
On 4th-gen 4Runners the integrated ABS actuator/brake master cylinder assembly (with electric pump motor and accumulator) fails internally. The pump motor or accumulator wears out so the pump never reaches pressure and runs continuously; owners get simultaneous ABS, BRAKE, VSC and TRAC warning lights, a loud continuous in-cabin alarm, electronic noise when braking, and a hard or sinking pedal with reduced assist. It is a safety-relevant failure and the assembly is one of the most expensive non-drivetrain parts on the truck. This is distinct from the brake booster/master-cylinder internal-leak issue: this is the ABS hydraulic actuator/accumulator unit.
- Brake Booster / Master Cylinder Internal Leak Causing Hard Pedal and Reduced Braking Assist2003-2009
Multiple 4th-generation 4Runner owners report the brake pedal becoming hard, requiring excessive effort to stop, often accompanied by ABS/VSC/TRAC warning lights and a buzzing or continuously running brake actuator. Toyota issued service information for brake booster pump/master cylinder concerns on related platforms, and owner complaints frequently describe internal accumulator or actuator failure rather than simple pad/rotor wear. Repairs are expensive because the booster/master/actuator assembly is typically replaced as a unit.
Toyota Camry(1 issue)
- Camry Hybrid Brake-Booster Internal Leak - T-SB-0130-19 / CSP ZKK2012-2014
Toyota T-SB-0130-19 and Customer Support Program ZKK apply to certain 2012-2014 Camry Hybrid vehicles with brake, ABS and/or TRAC warning lights or a Check VSC message. Verification requires C1391, C1252, C1256 or C1253. Toyota attributes the specified condition to a small internal brake-fluid leak in the brake-booster assembly with master cylinder. Warning lamps can have other causes, and the documents do not support extending this record to gasoline Camrys or other model years. ZKK's primary coverage ended March 31, 2021; its secondary coverage was 10 years or 150,000 miles from first use, so its published coverage period has expired for this model-year range as of 2026.
Toyota Highlander(1 issue)
- Hybrid Brake Booster / ABS Actuator Assembly Failure (Accumulator Leak) — C13912006-2013
The regenerative-braking brake actuator (the integrated ABS/booster/accumulator pump module) is a known weak spot on the Highlander Hybrid. The accumulator develops an internal leak and the pump runs constantly, triggering a loud, repetitive whirring/buzzing and warning lights; in some cases brake assist is reduced, which owners describe as a serious safety concern (the same family of actuators drove early Prius brake recalls). CarComplaints documents repeated brake actuator complaints on the 2006 Highlander Hybrid, and the repair is rarely covered out of warranty.
Looking for C1252 on a different make?
View C1252 across all makes →Frequently Asked Questions
What does C1252 mean on Toyota?▼
C1252 stands for "Manufacturer-Specific Chassis Code (commonly ABS/Brake Pressure or Wheel Circuit)." C1252 is a chassis code that is largely manufacturer-specific, so the precise definition depends on the vehicle make. It generally points to a fault within the ABS/traction/brake hydraulic control system, such as a pressure sensor, solenoid, or wheel-circuit problem detected by the ABS control module. Because chassis 'C' codes affect braking and stability systems, related warning lights (ABS/traction) often illuminate and the function may be temporarily disabled. The exact component and circuit should be confirmed with make-specific service data. On Toyota specifically, this code is documented across 3 models.
What causes C1252 on Toyota vehicles?▼
Common causes on Toyota: Faulty brake/ABS pressure sensor or solenoid, Wheel speed sensor or related wiring fault, Open, short, or corrosion in the ABS circuit, Failing ABS/EBCM control module, Poor ground or low system voltage. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1252 on a Toyota?▼
Repair costs on Toyota range from $1,200 to $3,500, depending on the specific model and root cause.
Which Toyota models have C1252 documented?▼
Au7o has documented C1252 on 3 Toyota models: 4Runner, Camry, Highlander.