What Does P2698 Mean?
The powertrain control module (PCM) has detected a performance issue with the fuel injector used in the exhaust aftertreatment system (typically for diesel particulate filter regeneration). The injector is not delivering fuel properly or timing is incorrect, affecting emissions system regeneration.
Common Causes
35%
Clogged or restricted aftertreatment fuel injector
30%
Failed aftertreatment fuel injector
20%
Low fuel pressure to aftertreatment injector
10%
Wiring harness issues or connector corrosion
5%
PCM software calibration issue
Diagnostic Steps
1
Step 1: Verify fuel supply pressure to the aftertreatment injector meets specifications using a fuel pressure gauge
2
Step 2: Inspect wiring harness and connectors to aftertreatment injector for damage, corrosion, or loose connections
3
Step 3: Perform active tests using scan tool to command injector operation and monitor fuel delivery
4
Step 4: Remove and inspect aftertreatment injector for carbon buildup or mechanical damage
5
Step 5: Replace aftertreatment fuel injector if performance test fails or visual inspection shows degradation
Estimated Repair Cost
$400 - $1,500
Parts + labor, varies by vehicle and location
The powertrain control module (PCM) has detected a performance issue with the fuel injector used in the exhaust aftertreatment system (typically for diesel particulate filter regeneration). The injector is not delivering fuel properly or timing is incorrect, affecting emissions system regeneration.
The most common cause of P2698 (Exhaust Aftertreatment Fuel Injector "A" Performance) is: Clogged or restricted aftertreatment fuel injector
Typical repair costs for P2698 range from $400 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but regeneration failure may cause DPF clogging, leading to reduced engine power and potential engine damage if ignored long-term.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2698 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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