I--- Toyota C052f14 -

After any sensor or booster repair, you must perform a brake stroke sensor zero point calibration. With a capable scan tool:

If you skip this step, the C052F14 code will return immediately.

Once repairs are complete:

If the i--- Toyota C052f14 returns immediately, you have a wiring short that you missed, or the brake booster ECU is faulty. i--- Toyota C052f14

Unlike a dead 12V battery, the car will often still move. However, the brake assist is compromised. Do not drive the vehicle any further than absolutely necessary to reach a repair shop.

The i--- Toyota C052f14 code most commonly appears in vehicles equipped with an electronic brake booster rather than a traditional vacuum booster. You will find this code in:

If you drive a conventional non-hybrid Toyota with a vacuum booster, you are unlikely to see this specific code. After any sensor or booster repair, you must

First, let’s break down the keyword. The "i---" prefix is likely a display artifact from a low-end or generic OBD2 scanner. The core trouble code is Toyota C052F14.

In Toyota’s Diagnostic Trouble Code (DTC) library:

The official definition of C052F14 is: "Brake Booster Pressure Sensor / Brake Booster Stroke Sensor – Circuit Short to Ground or Open." If you skip this step, the C052F14 code

In simpler terms: your Toyota’s computer has detected an electrical fault in the sensor that monitors how hard or how far you press the brake pedal, specifically within the electronically controlled brake booster (used in hybrids and modern advanced braking systems).

With the engine off, measure voltage at the battery. Below 11.8V or above 12.6V (after charging) can cause false codes. Ensure stable 12.0-12.6V.

This is a dealer-level repair. The part alone (Toyota part no. 47070-47010 for Prius) costs over $1,200. It requires bleeding the ABS actuator with a scan tool. Do not attempt this unless you are a professional mechanic.