Ford Codes List

Ford-enhanced trouble code lookup
for Ford, Lincoln and Mercury.

Repair Order

655 Ford-enhanced codes on file

Code
P1808

Transmission 4-Wheel Drive Low Indicator Circuit Failure

Category
Powertrain - Transmission
Severity
Check Engine Light
Applies to
F-150, Super Duty, Explorer, Ranger
Related
No single generic twin. See OBD Codes List

Findings, check these first

  • Burned-out 4WD Low bulb
  • Open indicator circuit
  • Failed cluster driver
  • Transfer case not reaching Low range
  • Corroded connector

Standard procedure

  1. Confirm Low range engages mechanically
  2. Check the bulb at key-on
  3. Test the indicator circuit
  4. Inspect connectors
  5. Repair the lamp or engagement fault

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: P1808 Ford definition

    live reference page (obdii.pro)

    Supports: Ford-family meaning for P1808: Transmission 4-Wheel Drive Low Indicator Circuit Failure

    Fetched directly. obdii.pro is a publisher independent of the engine-codes family.

  • P1808 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes

    live reference page (obd2-codes.co)

    Supports: Ford meaning for P1808: Transmission 4-Wheel Drive Low Indicator Circuit Failure

    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 P1808. Include your vehicle, the issue and a source if you have one.

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