Throttle Position

DTC P0121 will be flagged if the output from one of the two sensors varies by more than a predetermined amount. This is calculated from the target throttle angle and the allowable difference between the two sensors.

Throttle output voltages are measured against reference values, with a failure judgement being made if the values are outside the prescribed limits; for DTCs P0122, P0123, P0222 & P0223.