The P2673: Injection Pump Timing Calibration Not Learned refers to a failure or incomplete process of learning the correct timing for the injection pump. This may be caused by problems with the calibration sensors or issues within the Engine Control Module (ECM) or Powertrain Control Module (PCM), leading to improper fuel delivery and reduced engine efficiency.
P2673 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2673: Injection Pump Timing Calibration Not Learned |
| Is it serious? | Yes, if not addressed, it can lead to improper fuel delivery, poor engine performance, and potential engine damage. |
| Possible causes | – Failed or incomplete injection pump timing calibration – Faulty calibration sensors – Issues with the ECM/PCM |
| How to diagnose? | – Perform injection pump timing calibration procedure – Check for issues with calibration sensors – Inspect the ECM/PCM for faults – Recalibrate or replace components as needed |
P2673 Meaning
The P2673: Injection Pump Timing Calibration Not Learned code indicates that the ECM/PCM has failed to learn or calibrate the injection pump timing correctly. This could occur due to failed calibration procedures, faulty sensors used during calibration, or problems within the ECM/PCM itself. Without the proper calibration, the timing of the fuel injection could be incorrect, which would affect the engine’s efficiency, fuel economy, and overall performance.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check if there are any additional codes that might indicate related issues, such as faults in sensors or modules. | OBD-II Scanner |
| Perform Injection Pump Timing Calibration | Follow the manufacturer’s procedure to perform the injection pump timing calibration. This may require specific tools or software. | Manufacturer-Specific Calibration Tool, Vehicle Owner’s Manual |
| Inspect Calibration Sensors | Check the calibration sensors for any signs of damage or improper readings. Replace if necessary. | Multimeter, Diagnostic Tool |
| Verify ECM/PCM Functionality | Inspect the ECM/PCM for any faults, error messages, or malfunctions that could be preventing the learning process. | Diagnostic Scanner, Specialized PCM Testing Tool |
| Check Wiring and Connections | Inspect all wiring and connections to the sensors and ECM/PCM for continuity, ensuring there are no loose, corroded, or disconnected wires. | Flashlight, Multimeter |
| Recalibrate System | After replacing any faulty components, repeat the calibration procedure to ensure the system can properly learn the injection pump timing. | Manufacturer-Specific Calibration Tool |
| Replace Faulty Components | Replace any components, such as the ECM/PCM or sensors, that are not functioning as required. | Replacement Parts |
| Clear the Code and Test Drive | Clear the code using an OBD-II scanner, and take the vehicle for a test drive to ensure the calibration has been successfully learned and the problem resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle to confirm that the P2673 code does not return and that the injection pump is correctly calibrated. | OBD-II Scanner |
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