Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The engine part that squirts fuel into cylinder number 6 is stuck and keeps letting fuel in, even when it's not supposed to.
The fuel injector for cylinder 6 is not closing properly, causing it to allow fuel to continuously enter the cylinder.
The P305B code is triggered when the Engine Control Module (ECM) detects that the fuel injector for cylinder number 6 is stuck in the open position, allowing an excessive amount of fuel to enter the combustion chamber. This can lead to poor engine performance, increased emissions, and potential damage to the engine.
• Rough idle
• Poor fuel economy
• Engine misfire
• Faulty fuel injector
• Wiring issues or poor connections
• ECM malfunction
ECM: Engine Control Module, the computer that controls engine functions.
Injector: A device that sprays fuel into the engine's combustion chamber.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to injector 6.
• Test the fuel injector for proper operation.
• Replace the faulty injector.
• Repair or replace damaged wiring.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Fuel injector tester
$200 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regular maintenance and inspection of fuel injectors
• Use high-quality fuel
• Keep the fuel system clean
Engine Performance
• Avoid driving the vehicle until repaired to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on fuel injectors.
The P305B code has been associated with vehicles that have high mileage or have not had regular fuel system maintenance.
High – Driving with this issue can cause engine damage and increased emissions.
Ignoring this code can lead to increased emissions, which may violate local environmental laws.
• Engine at operating temperature
• Vehicle in idle or under load
The fuel injector for cylinder 6 is located on the engine, near the intake manifold.
Q: Can I drive with a P305B code?
A: It's not recommended to drive with this code active, as it can cause further engine damage.
Q: How urgent is it to fix a stuck open injector?
A: It is urgent to fix it as soon as possible to avoid engine damage and poor performance.
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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.