P264F
Engine Serial Number Not Programmed or Incompatible
The engine controller cannot read a valid engine serial number from its non-volatile memory, or the stored value does not match the expected pattern. Calibration sets keyed to the serial number cannot be applied.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Replacement ECU not programmed at installCommon
- Non-volatile memory corruptionPossible
Parts involved
- Control Module
- Non Volatile Memory
P264F is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.