What Does P2674 Mean?
The engine control module has not learned or stored the fuel injection pump calibration values. This typically occurs after pump replacement, ECM replacement, or loss of adaptive learning data.
Common Causes
35%
Fuel injection pump replaced without proper calibration procedure performed
30%
ECM replaced or reprogrammed without running fuel system relearn
20%
Battery disconnection causing loss of adaptive fuel trim data
10%
Failed or corrupted ECM memory
5%
Incomplete or interrupted relearn procedure
Diagnostic Steps
1
Step 1: Verify ECM software version is current and supports fuel pump calibration
2
Step 2: Check service history for recent injection pump or ECM replacement
3
Step 3: Perform manufacturer-specific fuel pump calibration/relearn procedure using factory scan tool
4
Step 4: If relearn fails, verify injection pump electrical connections and communication circuits
5
Step 5: Test ECM memory function and replace if calibration data cannot be stored
Estimated Repair Cost
$100 - $300
Parts + labor, varies by vehicle and location
The engine control module has not learned or stored the fuel injection pump calibration values. This typically occurs after pump replacement, ECM replacement, or loss of adaptive learning data.
The most common cause of P2674 (Injection Pump Fuel Calibration Not Learned) is: Fuel injection pump replaced without proper calibration procedure performed
Typical repair costs for P2674 range from $100 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may exhibit poor fuel economy, rough idle, or reduced power but is generally safe to drive short distances to repair facility.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2674 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
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