PCM/ECM sets DTC P2138 if the PCM/ECM detects output voltage of the APS1 is not proportion to APS2.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility check | 1. Poor connection or damaged harness 2. APS1 3. APS2 |
Enable Conditions |
•
No relevant failure
•
APS1 >1.0V or APS2 >0.55V | |
Threshold Value |
•
Ratio check between pedal sensor channel 1and 2 | |
Diagnostic Time |
•
0.35sec. | |
MIL On Condition |
•
Immediate | |
Limp-Home |
•
Forced limited power mode : The PCM/ECM limits opening angle of the throttle valve to max. 50% and engine torque to a certain pre-determined value.
•
After idle recognition, the PCM/ECM uses APS2 signal to calculate the current opening angle of the throttle valve. |
