Throttle Position Sensor: Notes

NOTE: Ensure Throttle Position (TP) sensor voltage is as specified. See TP SENSOR VOLTAGE table. TP sensor is not adjustable. For further testing procedures, see appropriate SELF-DIAGNOSTICS article.

NOTE: On some models, throttle control is electronic with no mechanical link from engine to accelerator pedal. The PCM and Throttle Actuator Control (TAC) module monitor the position of accelerator pedal based on signals from a nonadjustable Accelerator Pedal Position (APP) sensor. The APP is mounted above the accelerator pedal.

TP SENSOR VOLTAGE

Application

⁽¹⁾ Volts

1.0L

⁽²⁾

1.3L

0.42-1.0 To 3.0-4.8

1.8L

0.3-0.8 To 3.2-4.9

1.9L

0.2-0.6 To 4.7

2.2L

Saturn

0.35-4.65

All Others

0.2-0.9 To 5.0

2.4L

0.2-0.9 To 5.0

3.0L

Sensor No. 1

⁽³⁾

Sensor No. 2

⁽⁴⁾

3.1L, 3.4L, 3.5L & 4.6L

⁽³⁾

3.8L

"F" Body

Sensor No. 1

⁽³⁾

Sensor No. 2

⁽⁴⁾

All Others

⁽³⁾

5.7L

"F" Body

⁽³⁾

"Y" Body

Sensor No. 1

⁽⁵⁾

Sensor No. 2

⁽⁶⁾

⁽¹⁾	Voltage range is from idle position to wide open throttle position.

⁽²⁾

Ensure engine is at normal operating temperature. Connect a DVOM (backprobe) between ground and TP sensor signal circuit at PCM. See appropriate wiring diagram in WIRING DIAGRAMS article. Voltage reading should be 0.98-1.02 volts with a .140" (3.5 mm) feeler gauge placed between throttle stop screw and throttle lever. Adjust or replace as necessary.

⁽³⁾	Voltage range is from less than one volt at closed throttle to greater than 4 volts at wide open throttle.

⁽⁴⁾	Voltage range is from greater than 4 volts at closed throttle to less than one volt at wide open throttle.

⁽⁵⁾	Voltage range is from less than 1.1 volt at closed throttle to 3.7 volts at wide open throttle.

⁽⁶⁾	Voltage range is from greater than 3.9 volts at closed throttle to less than 1.2 volt at wide open throttle.