P2697 code meaning
Exhaust Aftertreatment Fuel Injector A Circuit/Open
Powertrain system Generic code P26xx codes Check engine light
What P2697 means
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.
P2697 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 P2697
- Active particulate filter regeneration not possible
- Rising soot load, later derate
- MIL on
Common causes of P2697
- Most 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
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 P2697 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. |
| 97 | The exact fault in that area. |
What to do next
- Note P2697 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 P2697
What does P2697 mean?
P2697 means "Exhaust Aftertreatment Fuel Injector A Circuit/Open". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2697?
Drive gently and only to a workshop. With P2697 the car can go into limp mode (reduced power) to protect itself.
Will P2697 fail an emissions test?
Yes, it can. P2697 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 P2697 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2697 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.