#FORD ENGINE CODES PO302 5.O F150 CODE#
The P0302 trouble code is considered serious. Addressing them during this process will save a lot of time. It is important to take the time to rule out all possible causes of the misfire code during diagnosis. Also make sure to rule out a faulty cylinder as the cause of the problem.Īny of these components could result in the P0302 trouble code. If applicable, diagnose and repair any other related trouble codes that are present. Visually inspect the fuel injector wiring for damage before replacing spark plugs, coil packs, or spark plug and coil pack wiring. Replacement or reprogramming may be necessary.Ĭommon mistakes when diagnosing the P0302 code If the P0302 trouble code is still unresolved, a problem with the powertrain control module is possible (this is not common). If the P0302 trouble code returns, an inspection of the cylinder 2 compression system will be done (this is not common). Conducts another test drive to see if the P0302 trouble code comes back again. If the P0302 trouble code returns after replacing any damaged spark plugs, coil packs, spark plug wires, and coil pack wiring, they will inspect the fuel injectors and fuel injector wiring for damage.įor vehicles with the distributor cap and rotor button system (older vehicles), they will inspect distributor cap and rotor button for corrosion, cracks, excessive wear, or any other damage.ĭiagnose and repairs any other related trouble codes stored by the powertrain control module. If necessary, replaces damaged spark plugs, spark plug wires, coil packs, and coil pack wiring Inspects the coil packs for excessive wear or damage Inspects the coil pack wires for wiring that is worn out or damaged Inspects spark plug cylinder 2 itself for excessive wear or damage
Inspects the spark plug wire for cylinder 2 for wiring that is worn out or damaged Uses the OBD-II scanner to collect freeze frame data and trouble codes stored by the powertrain control moduleĬhecks to see if the P0302 trouble code comes back by test driving the car How does a mechanic diagnose the P0302 code? Car will not start or is difficult to start.Check Engine Light that is on or flashing.Damaged or worn out rotor button (does not apply to all vehicles).Damaged or worn out distributor cap (does not apply to all vehicles).Damaged or worn out spark plug wires and/or coils.The P0302 trouble code is an indication that cylinder 2 is misfiring and is not getting the necessary spark to its spark plug. A blinking Check Engine Light indicates a more serious misfiring problem.
If the crankshaft revolutions per minute have increased or decreased more than 10 percent, the Check Engine Light will blink. If the crankshaft revolutions per minute have increased or decreased between 2 percent and 10 percent, the Check Engine Light will come on. If the percentage of that increase or decrease becomes greater than 2 percent, the powertrain control module will store a trouble code. The crankshaft revolutions per minute (RPM) may increase or decrease if a cylinder misfires. This process is what what makes the vehicle run smoothly. As each cylinder fires, the crankshaft is able to rotate continuously.
All of the cylinders work together to regulate the rotation of the crankshaft. The energy released by the fuel combustion powers the crankshaft. The spark plug uses an electric spark to ignite the flammable air/fuel mixture, producing energy. A spark plug is located on the top of each cylinder. Each cylinder fires a spark plug one after another. Most vehicles have either 4 or 6 cylinders. In Spark Ignition Direct Injection (SIDI) system applications, if a fuel injector fault DTC is set during a misfire event, the ECM will not re-enable the injector.Cylinder 2 misfire detected What the P0302 code means If the misfire is not present, the fuel injector will remain enabled by the ECM. If the misfire is still present, the ECM will disable the fuel injector again repeating the process. The ECM will then re-enable the fuel injector and, after approximately 200 engine revolutions, will determine if the misfire is still present. When the ECM detects that one or more specific cylinders are misfiring, the DTC for the respective misfiring cylinder will set, and up to 2 of the corresponding fuel injectors are disabled for a minimum of 30 s. The Diagnostic Trouble Codes (DTC) P0302 correspond to cylinders 2. The malfunction indicator lamp (MIL) will flash when the conditions for catalytic converter damage are present. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM can detect individual cylinder misfire events.Įxtreme cylinder misfire events can cause catalytic converter damage. The Engine Control Module (ECM) uses information from the crankshaft position sensor and the camshaft position sensor to determine when an engine cylinder misfire is occurring.
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