Other common symptoms include:. They will take note of all the existing codes and their associated freeze frame data before clearing the codes for a fresh start. Then, they will take the vehicle for a test drive and put it into similar circumstances when the freeze frame data was stored.
Next, they check for damages or signs or wear and tear in the spark components, as well as test the spark plug coil and all its wirings. Next, they will use the scan tool to monitor the operation of the secondary ignition coil circuit. Repairs for this code are as easy as its diagnosis. Obviously, as with other error codes, it requires a thorough diagnosis to be fixed.
Have a look at them below:. Common Symptoms. Looking out for some ways with the help of which you can correct this fault code?
Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:. We are sure that now all your issues would be resolved. It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P code to be stored:.
Most of the people might overlook the fact that a vacuum leak can be a reason why P fault code is triggering. Also, some may neglect to measure the hertz signal that should be sent by the ECM to the coil pack.
Measuring the Hertz signal will help you determine if the Engine Control Module is faulty, or if there is an interruption in the coil pack circuit, such as corrosion build up or damaged wiring. Have a look at some common mistakes which are made when diagnosing the P fault code:. Featured Products. Premium Materials …. For example, P indicates a fault in the 1 cylinder coil circuit. Likewise, P indicates a problem with the coil circuit on cylinder 8. To sum things up, the common causes for code P are as follows:.
In addition to an illuminated check engine light, the most common symptom is an ignition misfire. Often, Px codes will also be accompanied by a misfire code PP The following steps will help you diagnose a Px code:. The first still is to visually inspect the coil pack and its connector.
Look for things like broken wires, corrosion, etc. Many times a problem can be solved with just a simple visual inspection. If you have an active misfire on one cylinder, swap the coil with another cylinder that is not misfiring. View the misfire counter on the scan tool.
If the misfire moves to the cylinder with the swapped coil, you know the coil is defective and not the control circuit. If however, the misfire remains on the same cylinder, you know the control circuit is to blame.
Alternately, you can try testing the coil with a digital multimeter. This test checks the resistance of the coil. Start by disconnecting the coil connector. Attach one lead of your multimeter to each terminal on the coil and set the meter to read ohms. This tests the coil primary circuit; typical readings should be 0.
Next, check the secondary circuit resistance. Typical readings should be 6, to 15, ohms. Testing coil resistance. Courtesy: autozone. Next, check the coil for power. This can easily be done with either a test light or digital multimeter set to volts. You should see around 12 volts on your meter lead. Note: on some vehicles the engine will have to be cranked during this test.
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