NOTE: Vehicles with Traction Control System (TRAC) are equipped with a main TP sensor and a sub-TP sensor. The following procedure applies to sub-TP sensor. For main TP sensor, see THROTTLE POSITION (TP) SENSOR .

Disconnect sub-TP sensor connector. Measure resistance across specified terminals of sub-TP sensor connector. See SUB-TP SENSOR RESISTANCE table. See Fig 1. If resistance is not as specified , adjust sub-TP sensor. See SUB-THROTTLE POSITION (SUB-TP) SENSOR under MISCELLANEOUS CONTROLS in appropriate ADJUSTMENTS article.

If PNP switch is out of adjustment, voltage signals may not be correctly applied to ECM, causing a trouble code to set. Before assuming PNP switch is faulty, adjust PNP switch. See PARK/NEUTRAL POSITION (PNP) SWITCH under MISCELLANEOUS CONTROLS in appropriate ADJUSTMENTS article. Recheck resistance. If resistance is still not as specified, replace sub-TP sensor.

SUB-TP SENSOR RESISTANCE

Throttle Plate

Sub-TP Sensor Terminals

Ohm Reading

Throttle Fully Closed

VTA2 & E2

340-6300

.012" (.35 mm) ⁽¹⁾

IDL2 & E2

500 Or Less

.020" (.50 mm) ⁽¹⁾

IDL2 & E2

Infinite (Open)

Throttle Fully Open

VTA2 & E2

2400-11,200

All Positions

VC & E2

3100-7200

⁽¹⁾	Remove sub-throttle actuator from throttle body. Insert feeler gauge between sub-throttle valve stop screw and gear.

Fig 1: Identifying Terminals Of Sub-TP Sensor & TP Sensor

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Sub-Throttle Position (Sub-TP) Sensor

Use the Manual With the Right Hardware

When to See a Mechanic

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