Code No. P2123:
Accelerator Pedal Position Sensor (Main) High
DIAGNOSIS CONTENT
Voltage above upper limit
TROUBLE JUDGMENT
Check Condition
Judgment Criterion
- The accelerator pedal position sensor (main) output voltage is above the threshold
for the specified time.
FAIL SAFE FUNCTION
Emergency run
PROBABLE CAUSE
- Failed accelerator pedal position sensor (main)
- Failed electrical harness in accelerator pedal position sensor (main) circuit
(Refer to Symptom Procedure - Accelerator Pedal Position Sensor (main) System 
.)