Ford Codes List

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

Repair Order

655 Ford-enhanced codes on file

Code
P1929

Fuel Additive Level Pump Control Circuit Performance (Diesel)

Category
Powertrain - Fuel/Air Metering
Severity
Check Engine Light
Applies to
Ford diesel models with additive systems
Related
No single generic twin. See OBD Codes List

Findings, check these first

  • Weak additive pump
  • Partially blocked dosing line
  • Worn pump motor
  • Low system voltage
  • Failing pump driver

Standard procedure

  1. Test pump output volume
  2. Check dosing lines for blockage
  3. Verify system voltage
  4. Command the pump and measure delivery
  5. Replace the pump if output is low

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: no source links are recorded for this entry.

Last updated 2026-09-06.

Report a correction for P1929. Include your vehicle, the issue and a source if you have one.

Related Fuel/Air Metering codes