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 thinks that one of the fuel injectors, which are like little spray bottles that put fuel into the engine, is stuck open and spraying too much fuel.
The Engine Control Module (ECM) has detected that the fuel injector for cylinder 2 or 4 is not closing properly, leading to excessive fuel entering the engine.
This code indicates that the ECM has detected an issue with the fuel injector on cylinder 2 or 4 being stuck in the open position. This can cause an imbalance in the air-fuel mixture, leading to poor engine performance and increased emissions.
• Poor fuel economy
• Rough idle
• Check Engine Light on
• Faulty fuel injector
• Wiring issues to the injector
• ECM malfunction
ECM: Engine Control Module, the computer that controls engine functions
Fuel Injector: A component that sprays fuel into the engine
• Check for any other related codes
• Inspect the wiring and connectors for the injectors
• Test the fuel injectors 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
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular maintenance and inspection
• Use quality fuel
• Keep the fuel system clean
Engine Performance
• Avoid driving the vehicle until repaired
• Consult a professional mechanic
• Regularly check fuel system components
Fuel injectors may be covered under the vehicle's powertrain warranty.
This code has been associated with vehicles experiencing injector issues due to poor fuel quality or lack of maintenance.
High – Can lead to engine damage if not addressed promptly.
Driving with a malfunctioning injector can increase emissions and is not compliant with emissions regulations.
• Engine running
• Vehicle at operating temperature
Fuel injectors are located on the engine, typically near the intake manifold.
Q: Can I drive with a P301F code?
A: It's not recommended as it can cause further engine damage.
Q: How do I know if my injector is stuck open?
A: Symptoms include rough idling, poor fuel economy, and a Check Engine Light.
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