Dtc P2440 Secondary Air Injection System Switching Valve Stuck Open Bank1
Refer to DTC P0412 ().
Refer to DTC P0416 ().
When the sensor output voltage remains at below 0.3 V, or higher than 4.7 V for more than 4 seconds, the ECM stores a DTC.
Knock sensors are fitted onto the engine block to detect engine knocking.
Each knock sensor contains a piezoelectric element which generates a voltage when it becomes deformed.