Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the fuel injector for cylinder number 10 in your car's engine. It's not working as it should, which can make the engine run poorly.
The engine control module (ECM) has detected an issue with the timing of the fuel injector on cylinder 10. The injector is not activating or deactivating at the correct times.
P3139 is triggered when the ECM detects that the low side of the high-pressure injector for cylinder 10 is not operating within the expected time parameters. This can affect the injector's ability to deliver the correct amount of fuel at the correct time, impacting engine performance.
• Engine misfire
• Reduced engine performance
• Check Engine Light illuminated
• Faulty fuel injector
• Wiring issues in the injector circuit
• ECM malfunction
ECM: Engine Control Module
Injector: A device that sprays fuel into the engine's cylinders
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 10's injector.
• Test the injector's resistance and operation.
• Replace the faulty injector.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Fuel injector tester
$150 - $600
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance and inspection of fuel injectors.
• Use high-quality fuel to prevent clogging.
• Check wiring and connectors periodically.
Engine Performance
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for warranty coverage on fuel injectors.
This code is less common and typically associated with high-performance or specialized engines with multiple cylinders.
Moderate – Should be addressed soon to avoid engine performance issues.
Ignoring this code may lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in a stationary position
The fuel injector for cylinder 10 is located on the engine block, typically near the intake manifold.
Q: Can I drive with a P3139 code?
A: It's not recommended to drive with this code, as it can lead to poor engine performance and potential damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are completed.
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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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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.