Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer hasn't figured out how to properly control the fuel pump, which helps deliver the right amount of fuel to the engine.
The engine control module (ECM) has not successfully learned the correct calibration for the fuel injection pump.
The P2674 code indicates that the ECM has failed to learn the necessary calibration settings for the injection pump. This can affect the engine's fuel delivery, leading to performance issues.
• Check Engine Light is on
• Poor engine performance
• Reduced fuel efficiency
• Faulty fuel injection pump
• ECM software issue
• Wiring or connector problems
ECM: Engine Control Module
Fuel Injection Pump: A component that delivers fuel to the engine at the correct pressure
• Check for any other related trouble codes.
• Inspect the wiring and connectors to the fuel injection pump.
• Perform a software update or reprogramming of the ECM if needed.
• Replace or repair the fuel injection pump if faulty.
• Update or reprogram the ECM software.
• Repair any damaged wiring or connectors.
• OBD-II scanner
• Multimeter
• Diagnostic software for ECM reprogramming
$200 - $1000
Moderate
• Ford F-Series
• Chevrolet Silverado
• Ram 1500
• Regular maintenance of the fuel system
• Timely software updates for the ECM
• Regular inspection of wiring and connectors
Engine Performance
• Get the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle under heavy load until repaired.
Check with the vehicle manufacturer for warranty coverage on the ECM and fuel system components.
This code has been reported in vehicles with diesel engines where the injection pump calibration is crucial for performance.
Moderate – While the vehicle may still be drivable, performance issues can worsen over time.
Ignoring this code may lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in a controlled environment
The injection pump is typically located on the engine block, near the fuel rail.
Q: Can I drive with a P2674 code?
A: It's possible, but not recommended due to potential engine performance issues.
Q: Will a P2674 code affect fuel efficiency?
A: Yes, it can lead to reduced fuel efficiency.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.