Ignition Diagnostic Monitor Signal Out of Self-Test Range
Findings, check these first
- Failing ignition module
- Aftermarket coils outside expected range
- IDM circuit fault
- Low system voltage during the test
- Corroded module connector
Standard procedure
- Verify battery voltage and re-run the test
- Return coils to stock specification
- Test the IDM circuit
- Inspect the module connector
- Replace the module after circuit checks
Code lookup
Type a code above, or start from a symptom or a common code.
Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.
Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1358 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1358: Ignition Diagnostic Monitor Signal Out of Self-Test Range
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1358 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1358: Ignition Diagnostic Monitor Signal Out of Self-Test Range
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-06.
Report a correction for P1358. Include your vehicle, the issue and a source if you have one.