Pinpoint Test C: P268C:00, P268D:00, P268E:00, P268F:00, P2690:00, P2691:00

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Contact with exposed fuel injector wiring, if energized, may result in electric shock. Use care when working on or around energized fuel injector wiring. Fuel injector wiring supplies high voltage to operate the fuel injectors. Failure to follow this instruction may result in serious personal injury.

WARNING: Before working on or disconnecting any of the fuel tubes or fuel system components, relieve the fuel system pressure to prevent accidental spraying of fuel. Fuel in the fuel system remains under high pressure, even when the engine is not running. Failure to follow this instruction may result in serious personal injury.

WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures may be present and may be ignited. Failure to follow these instructions may result in serious personal injury.

WARNING: Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related component. Highly flammable mixtures may be present and may be ignited. Failure to follow these instructions may result in serious personal injury.

WARNING: When handling fuel, always observe fuel handling precautions and be prepared in the event of fuel spillage. Spilled fuel may be ignited by hot vehicle components or other ignition sources. Failure to follow these instructions may result in serious personal injury.

WARNING: Clean all fuel residue from the engine compartment. If not removed, fuel residue may ignite when the engine is returned to operation. Failure to follow this instruction may result in serious personal injury.

NOTE: Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P268C:00	Cylinder 1 Injector Data Incompatible: No Sub Type Information	Sets when the fuel injector code is missiong or invalid. Each injector has a code stored in the EEPROM that provides information to the PCM about deviations of that fuel injector from a theoretical average fuel injector.
PCM P268D:00	Cylinder 2 Injector Data Incompatible: No Sub Type Information	Sets when the fuel injector code is missiong or invalid. Each injector has a code stored in the EEPROM that provides information to the PCM about deviations of that fuel injector from a theoretical average fuel injector.
PCM P268E:00	Cylinder 3 Injector Data Incompatible: No Sub Type Information	Sets when the fuel injector code is missiong or invalid. Each injector has a code stored in the EEPROM that provides information to the PCM about deviations of that fuel injector from a theoretical average fuel injector.
PCM P268F:00	Cylinder 4 Injector Data Incompatible: No Sub Type Information	Sets when the fuel injector code is missiong or invalid. Each injector has a code stored in the EEPROM that provides information to the PCM about deviations of that fuel injector from a theoretical average fuel injector.
PCM P2690:00	Cylinder 5 Injector Data Incompatible: No Sub Type Information	Sets when the fuel injector code is missiong or invalid. Each injector has a code stored in the EEPROM that provides information to the PCM about deviations of that fuel injector from a theoretical average fuel injector.
PCM P2691:00	Cylinder 6 Injector Data Incompatible: No Sub Type Information	Sets when the fuel injector code is missiong or invalid. Each injector has a code stored in the EEPROM that provides information to the PCM about deviations of that fuel injector from a theoretical average fuel injector.

Possible Sources

Incorrectly programmed injector quantity adjustment value

C1 CHECK FOR PCM (POWERTRAIN CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) S

NOTE: DTCs P268C, P268D, P268E, P268F, P2690, P2691, P2692 or P2693 may be accompanied by other DTCs. Diagnose all other DTCs before entering this pinpoint test.

Using a diagnostic scan tool, carry out the PCM self-test.

Are any DTCs other than P268C, P268D, P268E, P268F, P2690, P2691, P2692 or P2693 present?

Yes	DIAGNOSE all other PCMDTCs.

No	Update the injector quantity adjustment value in the PCM to match the value on the current fuel injector using a scan tool. Clear the DTCs and repeat the self-test.