P2699Exhaust Aftertreatment Fuel Injector A Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2699 flags the drive circuit of the exhaust fuel doser as too low, usually a grounded control wire or a shorted valve coil. The difference to P2697 matters in practice: an open circuit simply stops dosing, while a grounded line can switch the valve on without command if the short sits behind the driver, so raw fuel may reach a cold catalyst. Volvo and Mack list P2699 with failure type 00 among the electrical faults of their aftertreatment hydrocarbon injector system and send the technician to the dosing module plug and harness, in the same guide that covers the open and high cases. No other maker documents the code publicly. Expect a lit MIL, cancelled regenerations and, if dosing stays blocked, a rising filter load with eventual power reduction.
- What you may notice
- MIL on and regeneration inhibited
- Possible white smoke if the valve opens uncommanded
- Derate after prolonged soot build-up
- Likely causes
- LikelyDoser control wire grounded against the frame or exhaust bracket
- PossibleShorted coil of the dosing valve
- RareFuel or water inside the module connector
- 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.