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P2674 OBD2: Injection Pump Fuel Calibration not Learned

P2674 OBD2: Injection Pump Fuel Calibration not Learned

What Does the P2674 Code Mean?

The P2674 code indicates that the Engine Control Module (ECM) has detected a problem with the injection pump fuel calibration. This issue arises when the vehicle’s injection pump fails to properly calibrate, leading to potential misfires and poor engine performance.

What Causes the P2674 Code?

The primary cause of the P2674 code is related to the injection pump. The injection pump is responsible for taking low-pressure fuel from the tank and converting it into high-pressure fuel for the fuel injectors. If the injection pump is not correctly timed or if it has failed, the P2674 code will trigger.

What Are the Symptoms of the P2674 Code?

Common symptoms associated with the P2674 code include:

  • Engine may not start
  • Engine may run rough

How Serious Is the P2674 Code?

The P2674 code is considered urgent and indicates that immediate action is necessary. Ignoring this code could lead to severe damage to the engine or could jeopardize the safety of the driver and passengers.

How to Diagnose the P2674 Code

Diagnosing the P2674 code involves using an OBD-II scanner to retrieve the code and then performing a thorough inspection of the injection pump and related systems. Technicians will often check for proper timing, any vacuum leaks, and the condition of the fuel system.

Common Repairs for the P2674 Code

Repairs may include:

  • Replacing the injection pump
  • Performing an injection pump relearn procedure
  • Addressing any timing issues associated with the injection pump

How Much Does It Cost to Fix the P2674 Code?

The cost to fix the P2674 code can vary widely based on the specific repairs needed. Generally, repairs can range from $500 to $2,500 depending on whether the injection pump needs to be replaced or if a simple relearn procedure suffices.

Can I Fix the P2674 Code Myself?

While some may attempt to fix the P2674 code themselves, it is highly recommended to seek professional assistance. Proper diagnosis and repair require specialized tools and knowledge to ensure the issue is resolved effectively. Attempting to fix it without adequate experience could lead to further damage and increased repair costs.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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