P2674 code meaning
Injection Pump Fuel Calibration Not Learned
Powertrain system Generic code P26xx codes Check engine light
What P2674 means
Electronically governed diesel injection pumps meter the quantity per stroke themselves, and each unit differs slightly in how much it delivers for a given command. P2674 reports that the quantity correction for the installed pump has not been learned or stored in the controller. No manufacturer documents this code publicly; P2672 and P2673 cover the timing side of the same pump. CARB requires 2015-on vehicles whose fuel pumps or injectors carry production tolerance compensation, such as coded parts or trim resistors, to verify that the right compensation is in use. Without it, fuelling can drift, giving smoke, uneven idle or a shortfall of power until the learn routine is run.
P2674 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P2674
- Check engine light on
- Smoke or uneven idle
- Reduced power
Common causes of P2674
- Most likelyQuantity learn not run after pump or controller replacement
- PossiblePump calibration data missing, wrong or not matching the installed pump
- Less likelyFuel metering actuator fault preventing the learn from completing
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Injection pumpControl moduleFuel quantity solenoid
What each part of P2674 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 74 | The exact fault in that area. |
What to do next
- Note P2674 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2674
What does P2674 mean?
P2674 means "Injection Pump Fuel Calibration Not Learned". Electronically governed diesel injection pumps meter the quantity per stroke themselves, and each unit differs slightly in how much it delivers for a given command. It is a generic code, so it means the same on every make.
Is it safe to drive with P2674?
Drive gently and only to a workshop. With P2674 the car can go into limp mode (reduced power) to protect itself.
Will P2674 fail an emissions test?
Yes, it can. P2674 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2674 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2674 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.