KlaroP0123
MODERATEThrottle/Pedal Position Sensor/Switch A Circuit High Input
What this code means
Throttle/Pedal Position Sensor/Switch A Circuit High Input. These codes concern the sensors that tell the control unit about the mixture: mass airflow, oxygen sensors, fuel trim corrections. They often point to an air leak or an ageing sensor rather than an outright failure.
How to read this code
- PPowertrain
- 0standardised code
- 1Fuel and air metering
- 23P0123
The letter P names the system: Powertrain. The digit 0 that follows marks a standardised code, shared by all manufacturers code. The next digit, 1, locates the fault: fuel and air metering.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back.
Nearby codes
- P0120Throttle Pedal Position Sensor/Switch A Circuit Malfunction
- P0121Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
- P0122Throttle/Pedal Position Sensor/Switch A Circuit Low Input
- P0124Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
- P0126Insufficient Coolant Temperature for Stable Operation