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P0362 is a diagnostic trouble code (DTC) for "Ignition Coil L Primary/Secondary Circuit Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0362 code means that the PCM has registered a fault in either the primary or the secondary circuit of one or more ignition coils; this fault specifically pertains to the electrical circuitry that allows the individual coils to communicate with and be controlled by the PCM.
The ignition system in a vehicle uses ignition coils in each cylinder. The ECM controls the ignition coils, causing them to work with the spark plug to create a spark for ignition. If the ignition coils do not respond to an on or off command, the ECM alerts the PCM to store the P0362 code.
Most often, the P0362 code is caused by a faulty ignition coil. However, there may be other causes, including:
Some of the symptoms of the P0362 code may include engine misfire, choppy acceleration, and decreased engine performance. The Check Engine Light will be on, and there may be other codes stored in the PCM related to the injector circuit or the cylinder where the malfunctioning coil is located. It’s possible that the fuel injector may be totally disabled in the affected cylinder.
After an OBD-II scanner verifies the P0362 code, a technician should inspect of all the wiring, connectors, and other electrical components, looking for damage, corrosion, loose connections, or other faults. Any damaged elements should be replaced, reconnected, or repaired. The mechanic should then clear the code and retest the system. If the code returns, the mechanic will then move on to other possible repairs.
In many cases, the symptoms that can manifest with the P0362 code lead technicians to believe that the vehicle needs a simple tune up, and do not perform a thorough diagnosis of the issue. Tune ups only address the symptoms, and may not prevent the issue from returning.
If an OBD-II scanner has detected the P0362 code, it indicates a serious problem that should be addressed right away. If left unrepaired, this code could indicate a malfunction that will eventually lead to engine failure.
In order to fix the issue causing the P0362 code, a mechanic will likely go through a standard set of repairs. They include:
It is important to clear the P0362 code from the PCM after each repair is performed, and retest the system. In the event that the code does not return, it is probable that the mechanic has fixed the issue causing the problem. By performing this test after every repair, the mechanic will know exactly what the problem was, and will be better able to diagnose and repair the issue again should it ever be a problem in the future.
In many cases, damaged circuits in the ignition coil circuit are caused by wildlife crawling into the top of the engine to seek warmth or shelter from bad weather. It’s a good idea to keep a vehicle in a garage, or covered, to prevent this from happening.
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