P0123 2018 Toyota RAV4 Code - Throttle / Pedal Position Sensor / Switch 'A' Circuit High Input

Code P0123 indicates a high voltage input from the Throttle/Pedal Position Sensor 'A' circuit, which may affect throttle control and engine performance.

Symptoms may include poor acceleration, rough idling, hesitation when pressing the gas pedal, reduced fuel efficiency, and the check engine light turning on.

Common causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

Driving with this code is not recommended as it can affect throttle response and lead to unsafe driving conditions. Address the issue promptly.

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the throttle position sensor, and checking the wiring and connectors for damage or loose connections.

Repairs may include replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

Repair costs vary depending on the issue, but replacing a throttle position sensor typically costs $200-$400, including parts and labor.

A dirty throttle body is unlikely to cause this specific code, but cleaning it can improve throttle response and eliminate other potential issues.

Regular maintenance, including inspecting wiring and sensors, keeping the throttle body clean, and addressing issues promptly, can help prevent this code.

Clearing the code may turn off the check engine light temporarily, but the underlying problem must be resolved to prevent the code from returning.