P2690 code meaning
Cylinder 5 Injector Data Incompatible
Powertrain system Generic code P26xx codes Check engine light
What P2690 means
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.
P2690 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 1 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2690
- Check engine light on
- Rarely uneven running
Common causes of P2690
- Most likelyCylinder 5 injector replaced without entering its code
- PossibleCode entered for the wrong cylinder because of the bank numbering
- Less likelyInjector code programming interrupted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injector cyl5Control module
What each part of P2690 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. |
| 90 | The exact fault in that area. |
What to do next
- Note P2690 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 P2690
What does P2690 mean?
P2690 means "Cylinder 5 Injector Data Incompatible". P2690 is the first code of the series that a four-cylinder engine cannot set; it needs at least five cylinders. It is a generic code, so it means the same on every make.
Is it safe to drive with P2690?
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 P2690 fail an emissions test?
Yes, it can. P2690 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 P2690 to fix?
Difficulty: medium. A typical repair takes 0.3 to 1 hours of work. This is a job for a workshop.
Will P2690 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.