What Does P02CC Mean?
The ECM has detected that the fuel injector offset learning for cylinder 1 has reached its minimum correction limit. Injector offset learning is an adaptive fuel control strategy where the ECM learns the precise opening characteristics of each injector. Hitting the minimum limit means the ECM cannot compensate further for the injector's deviation from expected behavior. The driver may notice rough idle, slight hesitation, or marginally increased emissions.
Common Causes
35%
Fuel injector on cylinder 1 has worn or aged beyond its adaptive learning range
25%
Incorrect or non-OEM replacement injector installed on cylinder 1 with different flow characteristics
20%
Carbon deposits on the injector tip altering the spray pattern and flow characteristics
12%
ECM adaptive memory corruption or learning values not properly reset after injector service
8%
Electrical resistance drift in the injector solenoid coil affecting opening timing
Diagnostic Steps
1
Review cylinder 1 injector offset learning values via manufacturer-specific scan data — confirm the value is at or near the minimum allowable correction threshold.
2
Compare cylinder 1 injector offset values to all other cylinders — if cylinder 1 is the only outlier, the issue is isolated to that injector or its circuit.
3
Verify the correct part number injector is installed on cylinder 1 — cross-reference with manufacturer specification, especially if injectors have been previously replaced.
4
Perform an injector reset/relearn procedure via the scan tool after verifying hardware is correct — this clears adaptive values and allows the ECM to re-learn from scratch.
5
Measure cylinder 1 injector electrical resistance (typically 11-18 ohms) and compare to manufacturer specification and other cylinders; significant deviation indicates a failing coil.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The ECM has detected that the fuel injector offset learning for cylinder 1 has reached its minimum correction limit. Injector offset learning is an adaptive fuel control strategy where the ECM learns the precise opening characteristics of each injector. Hitting the minimum limit means the ECM cannot...
The most common cause of P02CC (Cylinder 1 Fuel Injector Offset Learning At Min Limit) is: Fuel injector on cylinder 1 has worn or aged beyond its adaptive learning range
Typical repair costs for P02CC range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code is generally not a safety concern and the vehicle can be driven normally. The primary risk is slightly degraded emissions and fuel economy. Address it at your next scheduled service appointment.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02CC to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
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