Drivable in a pinch, but with ABS, traction and stability control off you lose those safety aids - repair it soon, particularly before poor weather. C1226 is a Toyota chassis code for an open or short in the SA2 (SREA) solenoid circuit inside the brake actuator's master cylinder solenoid. The skid-control ECU pulses these solenoids to modulate brake-line pressure for ABS and stability control; when it reads the circuit open or shorted for even a fraction of a second it stores C1226 and turns off ABS, traction and VSC. Normal braking is unaffected.
What C1226 means
The master cylinder solenoid is a block of solenoid valves the skid-control ECU switches to raise, hold and release pressure at the wheel cylinders during ABS and stability-control events. C1226 sets when the SA2/SREA solenoid coil circuit reads open or short for about 0.05 seconds or more. The solenoid and its wiring are contained inside the master cylinder solenoid, which is part of the brake actuator assembly, so the circuit cannot be tested externally - the factory approach is to confirm the fault under real driving and, if it repeats, replace the actuator. It is commonly stored with the other solenoid codes in the C0226-C0256 and C1225-C1228 group.
Symptoms
- ABS warning light on
- VSC/traction (skid) and slip lights on
- Brake system warning light on
- ABS, traction and stability control disabled (normal braking retained)
- Frequently stored with other solenoid codes (C0226, C0236, C1225-C1228)
Common causes
- Internal open or short in the master cylinder solenoid coil or its internal wiring
- Failed brake actuator assembly
- Low system voltage or a poor ground while the solenoid is operating
- Connector or harness fault at the brake actuator
- Rarely, a faulty skid-control ECU driver
Severity & driving advice
Severity: Moderate — ABS and stability control are disabled; base brakes still work, so drive with extra care.
Can I drive? Drivable in a pinch, but with ABS, traction and stability control off you lose those safety aids - repair it soon, particularly before poor weather.
Diagnostic approach
- Read all chassis codes — Scan the ABS/VSC system and note any companion solenoid codes in the same group.
- Check voltage and grounds — Confirm battery/charging voltage and clean grounds - a weak supply can momentarily open the coil circuit.
- Inspect the actuator connector and harness — Check the brake actuator connector and wiring for corrosion, damage or loose terminals and repair as needed.
- Reconfirm the fault under driving — Clear the codes, drive at about 32 km/h (20 mph) for 60 seconds or more, then recheck to see whether C1226 returns.
- Replace the actuator if the code repeats — Because the solenoid and its circuit are internal and cannot be serviced separately, a returning DTC means the master cylinder solenoid / brake actuator assembly is at fault and is replaced.
- Calibrate and clear — Perform the required calibration after replacement, then clear the codes and confirm the warning lights go out.
Estimated repair costs
Typical US repair costs (parts & labour) for the faults behind C1226. These are national-average estimates, not a quote— your actual price varies by region, shop labour rate, and your vehicle’s make, model and year. Figures reviewed 2026.
| Repair | Estimated cost (USD) |
|---|---|
| Diagnosis (scan and inspection) | $75–$150 |
| Brake actuator (master cylinder solenoid) assembly with calibration | $900–$2,000 |
Make & model notes
Toyota: Seen on 2014 Toyota models sharing this brake actuator - including 4Runner, Avalon, Camry, FJ Cruiser, Prius, Sequoia, Tacoma and Tundra. The SA2/SREA solenoid is internal to the master cylinder solenoid, so C1226 is confirmed by driving and resolved at the actuator.
FAQ
Can the SA2 solenoid be replaced on its own?
No - it is internal to the master cylinder solenoid, which is part of the brake actuator assembly, so the assembly is replaced as a unit.
Why does the procedure say to drive at 20 mph and recheck?
The solenoid circuit can't be tested externally, so the fault is confirmed under real operation before condemning the (non-serviceable) solenoid.
Can I drive with C1226?
Your normal brakes still work, but ABS, traction and stability control are off, so the car won't help you in a skid or hard stop. Repair it promptly.
Is C1226 the same across Toyota models?
The meaning - an open or short in the SA2/SREA solenoid circuit - is the same on the 2014 Toyotas that use this actuator; the exact part number varies by model.