PCM/ECM sets DTC P0123 if the PCM/ECM detects signal voltage higher than the possible range of a properly operating TPS1.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Voltage range check | 1. Open in ground circuit 2. Short to battery in signal circuit 3. Poor connection or damaged harness 4. Faulty TPS1 | |
Case1 | Enable Conditions |
•
Ignition "ON" | |
Threshold Value |
•
TPS1 > 4.9V | ||
Case1 | Enable Conditions |
•
Ignition "ON"
•
In idle status
•
Target throttle angle < 58%
•
MAF Limphome detected or TPS2 failure detected | |
Threshold Value |
•
TPS1 > 3.0V | ||
Diagnostic Time |
•
0.05 sec. | ||
Mil On Condition |
•
1 Drive Cycles | ||
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. | ||
