What Does P2697 Mean?
The ECM has detected an electrical fault in the circuit controlling the diesel exhaust aftertreatment fuel injector (dosing injector). This injector sprays fuel into the exhaust system to facilitate regeneration of the diesel particulate filter or to assist with SCR catalyst operation.
Common Causes
35%
Open or short circuit in dosing injector wiring harness
30%
Failed aftertreatment fuel injector
20%
Corroded or damaged injector connector
10%
Failed dosing injector control module or relay
5%
ECM internal driver circuit failure
Diagnostic Steps
1
Step 1: Visually inspect dosing injector wiring harness and connector for damage, corrosion, or loose connections
2
Step 2: Measure resistance of dosing injector; compare to manufacturer specifications (typically 2-8 ohms)
3
Step 3: Check for voltage supply at injector connector with key on; verify ground circuit continuity
4
Step 4: Perform injector actuation test using scan tool to verify mechanical operation and listen for clicking
5
Step 5: If wiring and injector test good, test control module/relay operation and ECM driver circuit using oscilloscope
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The ECM has detected an electrical fault in the circuit controlling the diesel exhaust aftertreatment fuel injector (dosing injector). This injector sprays fuel into the exhaust system to facilitate regeneration of the diesel particulate filter or to assist with SCR catalyst operation.
The most common cause of P2697 (Exhaust Aftertreatment Fuel Injector "A" Circuit/Open) is: Open or short circuit in dosing injector wiring harness
Typical repair costs for P2697 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but DPF regeneration will be impaired, potentially leading to limp mode or reduced performance if particulate filter becomes clogged. Repair promptly to avoid costly DPF replacement.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2697 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions/Exhaust Aftertreatment
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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