Powertrain, generic (extended)

P2690 Cylinder 5 Injector Data Incompatible

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

P2690 is the first code of the series that a four-cylinder engine cannot set; it needs at least five cylinders. It reports that the flow correction for the cylinder 5 injector is absent or rejected by the controller. GM uses it in its 2025 six-cylinder diesel table 25OBDG04B as well as in its V8 diesel tables, Type A, with the value stored under DID $64. Ford's 2023 diesel summary, which spans the 3.0 L V6 and 6.7 L V8, includes it too. On V engines the location of cylinder 5 varies: Ford counts one bank first, GM alternates sides, so the service data must be checked before touching an injector. Expect a lit MIL rather than drivability trouble.

Likely causes

Cylinder 5 injector replaced without entering its code

Code entered for the wrong cylinder because of the bank numbering

Injector code programming interrupted

Symptoms

Check engine light on
Rarely uneven running

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€50–250

Time0.3–1 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel injector cyl5control module

Related codes

P268F P2691 P2696 P0205 P02F2

References: law.cornell.edu, gsi.ext.gm.com, fordservicecontent.com.