Ford Codes List

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

Repair Order

655 Ford-enhanced codes on file

Code
P1904

Kickdown Solenoid Circuit High Voltage

Category
Powertrain - Transmission
Severity
Check Engine Light
Applies to
Older Ford automatics

Findings, check these first

  • Solenoid circuit shorted to power
  • Failed solenoid
  • Stuck relay holding power on
  • Wiring fault
  • Control module fault

Standard procedure

  1. Test for shorts to power
  2. Check relay release
  3. Inspect wiring
  4. Test solenoid resistance
  5. Repair or replace per tests

Code lookup

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Sources and review

Review: checked against the recorded source material.

  • OBDII.pro: P1904 Ford definition

    live reference page (obdii.pro)

    Supports: Ford-family meaning for P1904: Pressure Control Solenoid "C" Open Circuit

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

  • P1904 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes

    live reference page (obd2-codes.co)

    Supports: Ford meaning for P1904: Kickdown Solenoid Circuit High Voltage

    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 P1904. Include your vehicle, the issue and a source if you have one.

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