P264F code meaning
Engine Serial Number Not Programmed or Incompatible
Powertrain system Generic code P26xx codes Check engine light
What P264F means
Some engine controllers store the serial number of the engine they belong to, much like the VIN. P264F is logged when that entry is empty or does not fit. Ford Special Service Message 47823 covers 2013 to 2019 E-Series, Super Duty, F-53/F-59 and F-650/750 models: after a PCM replacement the MIL comes on with P264F until the engine serial number, taken from the build records in OASIS, is written into the new PCM with the Ford scan tool. Ford's 2023 diesel OBD summary groups the code with P0630 under vehicle configuration, and Ford's 2014 gasoline list marks it with MIL. GM's 2024 heavy-duty ECM tables set it when any stored serial digit still reads 0xFF, checked continuously, Type A after one trip. It is a configuration fault, not mechanical damage.
P264F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.3 to 1 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P264F
- MIL on after control module replacement
- Usually no change in how the engine runs
Common causes of P264F
- Most likelyEngine serial number not written after PCM/ECM replacement
- PossibleSerial number from another engine or used control module
- Less likelyStored configuration lost through a memory fault in the module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Control moduleNon volatile memory
What each part of P264F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 4F | The exact fault in that area. |
What to do next
- Note P264F 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 P264F
What does P264F mean?
P264F means "Engine Serial Number Not Programmed or Incompatible". Some engine controllers store the serial number of the engine they belong to, much like the VIN. It is a generic code, so it means the same on every make.
Is it safe to drive with P264F?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P264F fail an emissions test?
Yes, it can. P264F 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 P264F to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 1 hours of work. This is a job for a workshop.
Will P264F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.