Failed TPS signal is determined by the difference between emasured 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 7.6%, PCM sets DTC P0121.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility Check | 1. Poor Connector Connection 2. Defected TPS1 or TPS2 Sensor 3. Defected MAP Sensor |
Enable Conditions |
•
Engine speed during engine start higher than 640 to 960 RPM depending on start ECT
•
No TPS adaptation request
•
No relevant DTC present | |
Threshold Value |
•
Deviation of TPS2 and TPS1 is higher than 7.6% | |
Diagnostic Time |
•
0.3 sec. | |
Mil On Condition |
•
1 Driving Cycle |
