ECM/PCM sends DTC P0121 if the difference between the throttle valve position value calculated by TPS1 and the designated value by ECM/PCM is over certain value when the TPS2 is abnormal.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Rationality check between TPS1 and TPS2 | 1. Poor connection 2. TPS 3. ECM/PCM |
Enable Conditions |
•
Engine speed > 320 rpm | |
Threshold Value |
•
TPS1 position – TPS2 position > 6.3~12.2%
•
TPS1 position - model TPS(if TPS2 Error) > 9% | |
Diagnosis Time |
•
- | |
Mil On Condition |
•
1 trip |
