Failed Throttle Position Sensor (TPS) signal is determined by the difference between measured mass air flow and calculated mass air flow based on each TPS signal and engine speed. If deviation of TPS2 and TPS1 is higher than 6.3%, ECM sets DTC P0121.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility check | 1. Poor connector connection 2. Faulty TPS1 or TPS2 sensor. 3. Faulty ECM |
Enable Condition |
•
Ignition switch "ON" | |
Threshold Value |
•
Deviation of TPS2 and TPS1 is higher than 6.3% | |
Diagnosis Time |
•
0.14 sec. | |
MIL ON Condition |
•
5 sec. |
