Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the computer in your car is having trouble sending enough power to a group of fuel injectors, which are like tiny squirt guns that spray fuel into the engine.
The engine control module (ECM) detects a low voltage condition in the circuit that supplies power to one or more fuel injectors in group A.
OBD-II Code P2147 is triggered when the ECM detects that the voltage in the fuel injector supply circuit for group A is below the expected range. This can affect the performance of the injectors, leading to engine misfires or poor performance.
• Engine misfires
• Poor fuel economy
• Check Engine Light is on
• Faulty fuel injector
• Wiring issues such as shorts or open circuits
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
Fuel Injector: A device that sprays fuel into the engine's intake manifold.
• Use a scan tool to confirm the code and check for other related codes.
• Inspect the wiring and connectors for damage or loose connections.
• Test the fuel injectors in group A for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace faulty fuel injectors.
• Replace or reprogram the ECM if necessary.
• OBD-II scan tool
• Multimeter
• Fuel injector tester
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect and maintain fuel system components.
• Ensure electrical connections are secure and free of corrosion.
• Use quality fuel to prevent injector clogging.
Engine Performance
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis and repair.
Check with your vehicle manufacturer; fuel injectors may be covered under certain powertrain warranties.
P2147 has been reported in vehicles with high mileage or those exposed to harsh driving conditions.
Moderate – Addressing this issue promptly can prevent engine damage and maintain performance.
Driving with a malfunctioning fuel injector can lead to increased emissions and potential safety hazards.
• Engine running
• Warm engine temperature
Fuel injectors are located on the engine, typically near the intake manifold.
Q: Can I drive with a P2147 code?
A: It's not recommended to drive with this code as it can lead to engine damage and poor performance.
Q: How serious is a P2147 code?
A: It's moderately serious and should be addressed to avoid further engine issues.
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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.
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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.
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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.