P20FC code meaning
Reductant Pump B Control Circuit Low
Powertrain system Generic code P20xx codes Check engine light
What P20FC means
P20FC sets when the drive signal for reductant pump B reads too low, typically a ground fault on the line or a current draw beyond what the driver allows. Pump B has no published limits. For pump A, Ford's 2023 diesel summary reports the low fault (P208C) when pump current exceeds 5 A or the pump controller draws more than 15 A, checked with the driver off and confirmed after about 8 seconds; a similar logic is likely for pump B but undocumented. The only codegenau manufacturer evidence comes from Ford: 2023–2024 Super Duty and F-650/F-750 6.7L trucks may log P20FC alongside P20FA and P20FD, and the SSMs point to wet or corroded connectors first. Unlike P20FA, the circuit is not open but pulled down; unlike P20FD it is not stuck high.
P20FC at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P20FC
- Malfunction indicator lamp on
- DEF system warning and reduced or no reductant dosing
- Restart lockout after the inducement countdown if left unrepaired
Common causes of P20FC
- Most likelyChafed wire shorting the pump B control line to ground
- Most likelyWater ingress or corrosion in the pump connectors
- PossiblePump B motor drawing excessive current (internal short or tight motor)
- Less likelyFaulty output stage in the control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Reductant pumpWiring harness
What each part of P20FC means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| FC | The exact fault in that area. |
What to do next
- Note P20FC and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P20FC
What does P20FC mean?
P20FC means "Reductant Pump B Control Circuit Low". P20FC sets when the drive signal for reductant pump B reads too low, typically a ground fault on the line or a current draw beyond what the driver allows. It is a generic code, so it means the same on every make.
Is it safe to drive with P20FC?
Drive gently and only to a workshop. With P20FC the car can go into limp mode (reduced power) to protect itself.
Will P20FC fail an emissions test?
Yes, it can. P20FC is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P20FC to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P20FC clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.