Powertrain, generic (extended)

P269A Exhaust Aftertreatment Fuel Injector A Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The high variant of the exhaust doser circuit means the control line shows supply voltage where the driver expects it to be pulled down, typically a short to battery positive or a driver that no longer conducts. In that state the valve cannot be opened, and a hard short can also overload the output, which the controller then switches off for protection. Volvo and Mack name P269A with failure type 00 first in the electrical fault table of the same AHI guide, with the same instruction as for its siblings: inspect the dosing module connection and wiring before replacing the module. Warranty only covers a new module when one of the listed module codes is active or confirmed. Without dosing the truck relies on passive regeneration and soot accumulates.

Likely causes

Doser control wire shorted to a positive supply
Output stage in the controller not switching
Pin damage in the dosing module connector

Symptoms

  • MIL on, regeneration requests fail
  • Filter soot level climbs over time
  • Derate in later stages

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hc dosing injectorinjector solenoidwiring harness

Related codes

P2697P2698P2699

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.