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The TPS sensor should produce around .5v at full closed throttle plate and around 4.5v with the pedal all the way down. I get these error codes P0123, P0223- which involve the drive By wire pedal sensor And high circuit voltage. is thus a wiring issue I should be checking before ... The voltage for the TPS with it disconnected to be over 4.47 volts. If it is that high, the PCM will not pulse the injectors. Could be something as easy as a ... P0123 is TPS1 (throttle position sensor) shorted high. P0222 is TPS2 shorted low. Considering that they're 'shorted' in opposite directions I'd ... No jumps in values in either direction. Normally that code means a defective part is detected, but best to test it before your replace it. You ... A P0123 code means that the car's computer has detected that the TPS (throttle position sensor) is reporting too high a voltage. Those codes are coming up as TPS Sensor Switch B circuit low and TPS sensor A circuit high input anyone have any idea whats wrong or has had the same issues as ... CAUSE: The Switch Sense circuit in the Clock spring in the steering wheel hub has shorted to battery voltage from the horn button circuit. When ... P0123 code ? Throttle position sensor NB (1999-2005) General discussion. Code reads 0123 - Throttle/Pedal Position Sensor/Switch A Circuit High Input. Along with this code I have some downstream sensor circuit codes.