Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Throttle Position Sensor/Switch: Description and Operation
DESCRIPTION:
The throttle position (TP) sensor is a potentiometer mounted on the throttle body. The TP sensor detects the position of the throttle plate and sends
this information to the processor assembly as varying voltage signal. The PCM uses the monitored voltage level of the TP sensor for control of
EPC pressure, torque converter clutch operation and shift scheduling.
If a malfunction occurs in the TP sensor circuit, the processor will recognize that the TP sensor signal is out of specification. The processor will
then operate the transmission in a high capacity mode to prevent transmission damage.
SYMPTOMS:
Harsh engagements, firm shift feel, abnormal shift schedule, torque converter clutch does not engage, or torque converter clutch cycling.
DIAGNOSTIC TROUBLE CODES:
P0121-P0123, P1120, P1121, P1124, P1125.
