The DTC P0121 is set when the intake manifold model filtered reduced area controller is out of range in low or high load.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility check between TPS1 and TPS2 | 1. Faulty TPS1 2. Poor connection or damaged harness. |
Enable Conditions |
•
No engine stop and engine start
•
No TPS adaptation request
•
No relevant failure | |
Threshold Value |
•
An absolute value of TPS2 - TPS1 > 7.6% | |
Diagnostic Time |
•
0.3sec. | |
MIL On Condition |
•
1 Drive Cycle | |
Limp-Home |
•
Forced limited power mode : When the DTC is set, the PCM/ECM reduces engine torque by 25% of normal value.
•
The PCM/ECM uses TPS2 signal to monitor the controlled opening angle of the throttle valve. |
