ECM/PCM sends DTC P0121 if the difference between the throttle valve position value calculated by TPS1and the designated value by ECM/PCM is over certain value when the TPS2 is abnormal.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Synchronization of signals | 1. Poor connection 2. TPS 3. ECM/PCM |
Enable Conditions |
•
IG "ON" | |
Threshold Value |
•
TPS value difference between TPS1 position and TPS2 position is higher then 6.3% | |
Diagnostic Time |
•
0.14 sec. | |
MIL ON Condition |
•
5 sec. |
