Toyota Corolla Cross: Meter / Gauge System

 Catalyst System Efficiency Below Threshold Bank 1 (P042000)

MONITOR DESCRIPTION The ECM uses air fuel ratio sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air fuel ratio sensor (sensor 1), sends pre-catalyst information to the ECM. The second sensor, the air fuel ratio sensor

 Brake Switch "B" Circuit Short to Battery (P070312)

DESCRIPTION The purpose of this circuit is to prevent the engine from stalling when the brakes are suddenly applied while driving with lock-up on. When the brake pedal is depressed, the stop light switch assembly sends a signal to the TCM. Then the TCM cancels the operation of the lock-up clut