OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P264F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyReplacement ECU not programmed at install
- PossibleNon-volatile memory corruption
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Module, Non Volatile Memory
Related codes
- P264CA Rocker Arm Actuator Position Sensor Circuit Low Bank 1
- P264DA Rocker Arm Actuator Position Sensor Circuit High Bank 1
- P264EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1
- P2650B Rocker Arm Actuator Control Circuit / Open Bank 1
- P2651B Rocker Arm Actuator System Performance/Stuck Off Bank 1
- P2652B Rocker Arm Actuator System Stuck On Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.