Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is having trouble learning how to control the fuel injector for cylinder 4. It's like trying to teach a robot to pour juice, but it keeps spilling it.
The engine control module (ECM) is unable to learn the correct injection pulse offset for cylinder 4, which is necessary for optimal fuel delivery and engine performance.
The ECM uses feedback from various sensors to adjust the fuel injector pulse width for each cylinder. For cylinder 4, the ECM is unable to learn the correct offset, which can lead to inefficient combustion and performance issues. This may be due to a malfunctioning injector, wiring issues, or a problem with the ECM itself.
• Check Engine Light is on
• Rough idle
• Poor fuel economy
• Engine misfires
• Reduced engine performance
• Faulty fuel injector on cylinder 4
• Wiring issues or poor electrical connections
• Malfunctioning ECM
• Sensor issues affecting feedback to the ECM
• Software or calibration issue in the ECM
ECM: Engine Control Module, the computer that controls engine functions.
Fuel Injector: A device that sprays fuel into the engine's cylinders for combustion.
• Use an OBD-II scanner to confirm the code and check for related codes.
• Inspect the wiring and connectors for cylinder 4's fuel injector.
• Test the fuel injector for proper operation.
• Check ECM for software updates or reprogramming needs.
• Perform a fuel pressure test to ensure adequate supply.
• Repair or replace the faulty fuel injector.
• Fix any wiring or connector issues.
• Reprogram or replace the ECM if necessary.
• Perform a software update on the ECM.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Fuel pressure tester
• Injector tester
• Basic hand tools
$150 - $600
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance and inspection of fuel injectors.
• Ensure timely software updates for the ECM.
• Keep electrical connections clean and secure.
Engine Performance
• Do not ignore the Check Engine Light; get it diagnosed promptly.
• Regularly service your vehicle to prevent injector issues.
• Consider using high-quality fuel to maintain injector cleanliness.
Check with your vehicle's manufacturer for specific warranty coverage on the ECM and fuel injectors.
This code is relatively uncommon and typically associated with specific vehicle models known for injector learning issues.
Moderate – Addressing this issue promptly can prevent further engine performance problems.
Driving with a malfunctioning injector can lead to increased emissions and potential safety risks due to engine performance issues.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The fuel injector for cylinder 4 is located on the engine, usually accessible by removing the engine cover.
Q: Can I drive my car with this code?
A: It's possible to drive short distances, but it's best to get it fixed soon to avoid further issues.
Q: Will this code cause my car to fail emissions tests?
A: Yes, unresolved injector issues can lead to increased emissions and potential test failures.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.