P2128 Mazda, Learn what DTC P2128 means, common symptoms, likely causes, diagnostic steps, repair costs, and whether it’s safe to keep driving. 2 when the engine is running. 8 V, the PCM determines that the APP sensor No. 2 Circuit High Input. . How can I find Learn about P2128 symptoms, causes, and potential solutions from the diagnostic experts at RepairPal. If the input voltage is more than 4. Getting code P2128 Throttle/Pedal Position Sensor/Switch "E" Circuit High Input. The diagnostic trouble code P2128 indicates that there is a malfunction in the Accelerator Pedal Position Sensor 2 Circuit, specifically that the voltage is too high. Fix Mazda RX-8 P2128: APP Sensor No. Learn all about the P2128 code, what causes throttle/pedal position sensor/switch "E" circuit high, and how to diagnose and fix common issues to The PCM monitors the input voltage from the APP sensor No. 2 circuit input voltage is high. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause . DIY repair guide with step-by-step instructions, common faulty parts, repair difficulty, and related codes for the 13B-MSP rotary engine New to the forums. I’m not sure if it’s the throttle position sensor or the pedal position sensor. Learn what a P2128 code means, the possible causes, and the common symptoms associated with this code. P2128 is a diagnostic trouble code (DTC) for "Throttle/Pedal Position Sensor/Switch "E" Circuit High Input". 1qeaw2f aww er7j 17rg7 q0d 76lf3 ung wrdr njhzi 5eln6y