P2699
Exhaust Aftertreatment Fuel Injector A Circuit Low
Voltage on the 7th injector control line is below the expected window. Usually a short to ground or a shorted solenoid coil.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to groundCommon
- Internal short in injector coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Hc Dosing Injector
- Injector Solenoid
- Wiring Harness
P2699 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.