OBD-I Codes List

Ford 58 Idle tracking switch circuit open or grounded

Make
Ford (1981-1995)
Category
Powertrain - Computer and Auxiliary Controls
Severity
Check Engine Light

How to read it

Code 58 reads as 5 flashes, pause, 8 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.

New to flash codes? The How to Read Ford EEC-IV Self-Test Codes walks through the test and what the numbers mean. The general OBD-I guide covers the rest.

What does Ford code 58 mean?

Idle tracking switch circuit open or grounded

Common causes of 58

  • Faulty idle tracking switch
  • Open or grounded switch wiring
  • Misadjusted throttle linkage
  • Corroded connector
  • Faulty vane air temperature sensor on EFI models

How to fix 58

  1. Confirm the code and check the throttle linkage adjustment
  2. Inspect the idle tracking switch wiring for an open or a short to ground
  3. Test the switch state through the throttle range
  4. Repair wiring before replacing the switch
  5. Replace the switch or sensor only after the circuit test fails

Source

Source review recorded

Sources and review

Review: checked against the recorded source material.

  • EEC-IV Ford trouble code table (MIL, description, type)

    archived reference page (troublecodes.net via Wayback Machine)

    Supports: code identity and meaning

    Fetched directly. Code row matches the description used in the data file.

    https://web.archive.org/web/20030720231430id_/http://www.troublecodes.net:80/Ford/eec-iv.shtml

Last updated 2026-09-25.

Report a correction for 58. Include your vehicle, the issue and a source if you have one.

Related Powertrain - Computer and Auxiliary Controls Codes