P2673 — Injection pump timing not properly calibrated

The engine's fuel injection pump timing has not been correctly learned or calibrated by the vehicle's control system. This can happen after repairs, battery disconnection, or software updates. Without proper calibration, the engine may run inefficiently or have performance issues.

Common causes

The cause is almost always one of a few things. Here they are — P2673 rarely comes from anything outside this list:

• Battery recently disconnected or replaced
• Failed or reset injection pump control module
• Software update or ECU reset without relearning
• Faulty injection pump or sensors
• Wiring or connector issues at injection pump

Where to start

In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:

1. Check and clear any stored codes
2. Perform injection pump timing relearn procedure with scan tool
3. Inspect wiring and connectors for damage or corrosion
4. Update or reflash engine control software if needed
5. Replace injection pump or control module if faulty

That is what holds for P2673 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.