P2128 2018 Toyota RAV4 Code - Throttle Pedal Position Sensor/Switch 'E' Circuit Input High

P2128 indicates that the throttle pedal position sensor/switch 'E' circuit has a higher-than-expected voltage input, which may affect throttle control and engine performance.

Symptoms may include reduced engine power, unresponsive throttle, a lit check engine light, and possible activation of "limp mode."

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

Driving with a P2128 code is not recommended as it can lead to unpredictable throttle response or reduced power, potentially causing unsafe driving conditions.

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the wiring and connectors, testing the throttle pedal position sensor, and checking for proper voltage and ground signals.

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

You’ll need an OBDII scanner, a multimeter to test voltage and continuity, and possibly basic hand tools to access and inspect the sensor and wiring.

The repair cost varies, but replacing the throttle pedal position sensor typically ranges from $150 to $300, including parts and labor. Wiring repairs may cost less, while ECM replacement is more expensive.

No, a dirty throttle body is not directly related to the P2128 code, as this code specifically pertains to the throttle pedal position sensor circuit.

Regularly inspect and maintain the throttle pedal assembly, wiring, and connectors. Address wiring issues promptly and avoid exposure to moisture or corrosion in the sensor connections.