P2673 Fault Code

Injection Pump Timing Calibration Not Learned

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2673 fault code indicates that the Injection Pump Timing Calibration has not been learned by the Engine Control Module (ECM). This can occur in vehicles with electronic fuel injection systems, where the timing of the fuel injection is critical for optimal engine performance. Proper calibration ensures that the fuel is injected at the precise moment for combustion, affecting efficiency and emissions.

What are the symptoms of the P2673 code?

Common symptoms associated with the P2673 code include:

• Poor engine performance, including rough idling or stalling.
• Decreased fuel efficiency and higher emissions.
• Engine warning light illuminated on the dashboard.
• Difficulty starting the engine.
• Increased engine noise due to improper fuel delivery.

What causes the P2673 code?

The primary causes of this fault code may include:

• A recent replacement of the injection pump or ECM.
• Electrical issues such as wiring faults, loose connections, or short circuits.
• Software glitches that prevent the ECM from learning the new timing data.
• Failure to perform a calibration procedure after replacing components.
• Malfunctioning sensors influencing timing.

How to fix P2673?

To resolve the P2673 fault code, consider the following steps:

• Verify all electrical connections related to the injection pump and ECM.
• Use a scan tool to check for additional fault codes or issues.
• If applicable, perform the necessary calibration procedure for the injection pump.
• Ensure that the injection pump and ECM are functioning correctly and are compatible with each other.
• Update the ECM software if needed, and clear any fault codes to see if the issue recurs.