Exhaust Aftertreatment Fuel Injector Circuit/Open
The P2697 code indicates a problem in the electrical circuit of the exhaust aftertreatment fuel injector, which is used to inject fuel into the exhaust stream for diesel particulate filter (DPF) regeneration. The powertrain control module (PCM) has detected an open circuit or high resistance in the injector circuit, preventing proper operation. This can lead to incomplete DPF regeneration, increased emissions, and potential damage to the aftertreatment system.
1. Most Common Causes
- Open or shorted wiring in the injector circuit
- Faulty exhaust aftertreatment fuel injector
- Corroded or damaged connector
- Blown fuse or relay
- Failed PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Increased exhaust smoke
- DPF regeneration issues or frequent regeneration
- Possible limp mode activation
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the injector wiring and connector for damage, corrosion, or loose connections.
Step 3: Test the injector circuit for continuity and resistance using a multimeter; compare to manufacturer specifications.
Step 4: Check the fuse and relay for the injector circuit.
Step 5: If circuit tests pass, test the injector itself by measuring its resistance; replace if out of spec.
Step 6: If all else fails, check for PCM issues or perform a more advanced diagnostic scan.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can lead to incomplete DPF regeneration, increased emissions, and potential damage to the aftertreatment system. Short trips may be okay, but you should address the issue promptly.
How much does it cost to fix?▼
The cost to fix P2697 typically ranges from $150 to $400, including parts and labor. The injector itself costs $50-$150, and labor adds $100-$250 depending on the vehicle and shop rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.