Possible causes
– Faulty Coolant Flow Control Valve Position Sensor
– Coolant Flow Control Valve Position Sensor harness is open or shorted
– Coolant Flow Control Valve Position Sensor circuit poor electrical connection
– Coolant Flow Control Valve Position Sensor harness is open or shorted
– Coolant Flow Control Valve Position Sensor circuit poor electrical connection
Tech notes
For Non-Hybrid Toyota Vehicles P1121 = Accelerator Pedal Position Sensor Range/Performance Problem. See: P1121 Toyota
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)