P2697 indicates the engine control module has detected an open circuit in the exhaust aftertreatment fuel injector control circuit. This injector typically doses fuel or hydrocarbon into the exhaust stream to support diesel particulate filter regeneration or selective catalytic reduction operation. The code sets when the ECM commands the injector on but measures no current flow.
The injector's internal solenoid winding has failed open, preventing current flow when commanded.
A broken wire, severed conductor, or damaged insulation in the injector power or ground circuit between the ECM and injector.
Oxidation, fretting corrosion, or a partially unseated connector at the injector or ECM preventing electrical continuity.
The dedicated fuse supplying voltage to the injector driver circuit has opened due to a transient overcurrent event.
Internal driver transistor or circuit trace failure within the ECM preventing output activation — rare but possible after wiring shorts.
The vehicle will likely enter a derate or limp mode to protect the aftertreatment system; extended operation risks DPF plugging and further damage.
No — this is a separate injector mounted in the exhaust system (often called a hydrocarbon doser or DEF doser depending on architecture), not a cylinder fuel injector.
ECM failure is a rare cause; wiring faults or injector coil opens are far more common. Replace the ECM only after confirming the driver circuit has failed with the injector and wiring verified good.
Yes — without proper aftertreatment fuel dosing, DPF regeneration and SCR efficiency are compromised, causing elevated particulate and NOx emissions.