Exhaust Aftertreatment Fuel Injector Performance Issue
The P2698 code indicates that the powertrain control module (PCM) has detected a performance problem with the exhaust aftertreatment fuel injector. This injector is used to introduce fuel into the exhaust stream to regenerate the diesel particulate filter (DPF) or to heat the catalytic converter. The PCM monitors the injector's electrical circuit and fuel flow; if the actual performance deviates from expected values, this code is set. Common causes include a clogged or failed injector, wiring issues, or a faulty PCM.
01. Most Common Causes
- Clogged or failed exhaust aftertreatment fuel injector
- Wiring or connector issues in the injector circuit
- Faulty PCM or injector driver
- Low fuel pressure or contaminated fuel
02. Symptoms You Will Notice
- Illuminated check engine light
- Reduced fuel economy
- Excessive exhaust smoke
- Possible DPF regeneration issues
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the injector and wiring for damage or corrosion.
Step 3: Test the injector resistance and compare to specifications.
Step 4: Check fuel pressure and quality.
Step 5: Perform a bidirectional test to command the injector open and monitor operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to DPF clogging and reduced engine performance. Immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and injector replacement, but can be higher if the PCM or other components need replacement.