What Does P269A Mean?
The PCM has detected abnormally high voltage or current in the exhaust aftertreatment fuel injector circuit. This electrical fault prevents proper control of the injector used for DPF regeneration.
Common Causes
35%
Short to voltage in aftertreatment injector wiring
25%
Failed aftertreatment fuel injector with internal open circuit
20%
PCM driver circuit failure providing excess voltage
15%
Corroded or damaged injector connector causing high resistance
5%
Wiring harness damage from heat or abrasion
Diagnostic Steps
1
Step 1: Disconnect aftertreatment injector and measure circuit voltage with key on; should read near zero volts
2
Step 2: Inspect wiring harness for damage, particularly areas near exhaust components or sharp edges
3
Step 3: Check for short to battery voltage by measuring continuity between injector control wire and battery positive
4
Step 4: Test injector resistance and compare to specifications; open circuit indicates failed injector
5
Step 5: If wiring and injector test good, suspect PCM driver circuit failure requiring module testing
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage or current in the exhaust aftertreatment fuel injector circuit. This electrical fault prevents proper control of the injector used for DPF regeneration.
The most common cause of P269A (Exhaust Aftertreatment Fuel Injector "A" Circuit High) is: Short to voltage in aftertreatment injector wiring
Typical repair costs for P269A range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to operate but regeneration system will not function, leading to potential DPF saturation and reduced performance if not repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P269A to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
