What Does P268F Mean?
The calibration data stored in the ECM for cylinder 4 fuel injector does not match the installed injector or is corrupted. This mismatch prevents proper fuel delivery compensation for that specific injector.
Common Causes
40%
Cylinder 4 injector replaced with incorrect or unprogrammed calibration code
25%
Wrong injector calibration code entered during programming procedure
20%
Injectors swapped between cylinders without updating ECM calibration map
15%
ECM memory corruption affecting cylinder 4 injector data storage
Diagnostic Steps
1
Step 1: Remove cylinder 4 fuel injector and verify calibration code stamped on injector body
2
Step 2: Compare physical injector code with data stored in ECM using scan tool
3
Step 3: Reprogram correct calibration code for cylinder 4 injector into ECM
4
Step 4: Clear codes and perform injector balance test to verify proper operation
5
Step 5: Monitor fuel trims and cylinder 4 contribution after programming to confirm correction
Estimated Repair Cost
$100 - $300
Parts + labor, varies by vehicle and location
The calibration data stored in the ECM for cylinder 4 fuel injector does not match the installed injector or is corrupted. This mismatch prevents proper fuel delivery compensation for that specific injector.
The most common cause of P268F (Cylinder 4 Injector Data Incompatible) is: Cylinder 4 injector replaced with incorrect or unprogrammed calibration code
Typical repair costs for P268F range from $100 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause cylinder 4 misfire, rough idle, and increased emissions. Prolonged operation can damage the catalytic converter and affect engine longevity.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P268F to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System - Direct Injection
Difficulty
Type
Generic (SAE)
Recommended Tools
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