P2697Exhaust Aftertreatment Fuel Injector A Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Many heavy diesels do not raise exhaust temperature for filter regeneration by late in-cylinder injection, but spray diesel straight into the exhaust ahead of the oxidation catalyst through a separate doser, often called the seventh injector. P2697 means the solenoid that meters this fuel cannot be driven because its circuit is open. Volvo and Mack document it in their aftertreatment hydrocarbon injector (AHI) guide for US10 engines with 2013 OBD and later, as P2697 with failure type 13: the electric valve sits in the AHI dosing module, which moved onto the fuel filter housing from model year 2017, while the nozzle in the exhaust is purely hydraulic. The guide sends technicians to the module connector and harness. No dosing means no active regeneration, and soot builds up in the filter.
- What you may notice
- Active particulate filter regeneration not possible
- Rising soot load, later derate
- MIL on
- Likely causes
- LikelyLoose, corroded or damaged connector at the dosing module
- PossibleHarness to the dosing valve broken by heat or vibration
- PossibleDosing valve coil inside the module burnt open
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.