P2699 code meaning
Exhaust Aftertreatment Fuel Injector A Circuit Low
Powertrain system Generic code P26xx codes Check engine light
What P2699 means
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.
P2699 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2699
- MIL on and regeneration inhibited
- Possible white smoke if the valve opens uncommanded
- Derate after prolonged soot build-up
Common causes of P2699
- Most likelyDoser control wire grounded against the frame or exhaust bracket
- PossibleShorted coil of the dosing valve
- Less likelyFuel or water inside the module connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hc dosing injectorInjector solenoidWiring harness
What each part of P2699 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. |
| 99 | The exact fault in that area. |
What to do next
- Note P2699 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 P2699
What does P2699 mean?
P2699 means "Exhaust Aftertreatment Fuel Injector A Circuit Low". P2699 flags the drive circuit of the exhaust fuel doser as too low, usually a grounded control wire or a shorted valve coil. It is a generic code, so it means the same on every make.
Is it safe to drive with P2699?
Drive gently and only to a workshop. With P2699 the car can go into limp mode (reduced power) to protect itself.
Will P2699 fail an emissions test?
Yes, it can. P2699 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 P2699 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2699 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.