1997 Geo Metro BaseFACTORY OEM SERVICE PROCEDURE

Throttle Position (TP) Sensor

THROTTLE POSITION (TP) SENSOR VOLTAGE

Application (1) Volts
1.0L & 1.3L (2) .98-1.02
(1) Measurement taken by backprobing Light Green/White wire of TP sensor.
(2) Install .14" (3.5 mm) feeler gauge between throttle stop screw and throttle lever. If Idle Speed Control (ISC) motor plunger contacts throttle lever screw, bring engine to operating temperature. Using a scan tool connected to DLC, ensure TP sensor voltage is .98-1.02 volts. Adjust or replace TP sensor as necessary.
Chapter Navigation
Return to Chapter: Fuel System
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.