P0362 OBD-II Trouble Code: Ignition Coil L Primary/Secondary Circuit Malfunction

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0362 code

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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0362 DIAGNOSTIC Get a fair and transparent estimate upfront

P0362 code definition

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.

What the P0362 code means

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.

What causes the P0362 code?

Most often, the P0362 code is caused by a faulty ignition coil. However, there may be other causes, including:

  • Shorted or open electrical wiring between the ignition coil driver circuit and the PCM.
  • Corroded or faulty connector for the ignition coil.
  • Open or shorted ignition coil harness.
  • In rare cases, a faulty PCM or ECM.

What are the symptoms of the P0362 code?

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.

How does a mechanic diagnose the P0362 code?

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.

Common mistakes when diagnosing the P0362 code

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.

How serious is the P0362 code?

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.

What repairs can fix the P0362 code?

In order to fix the issue causing the P0362 code, a mechanic will likely go through a standard set of repairs. They include:

  • Replacing a faulty coil.
  • Repairing or replacing shorted or open electrical wiring between the ignition coil driver circuit and the PCM/
  • Replacing a corroded or faulty connector for the ignition coil.
  • Replacing an open or shorted ignition coil harness.
  • In rare cases, replacing a faulty PCM or ECM.

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.

Additional comments for consideration regarding the P0362 code

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.

Need help with a P0362 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
p0362
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0362 code.

SCHEDULE P0362 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,395

Rating Summary
4,978
202
50
30
135
4,978
202
50
30
135

Anthony

6 years of experience
18 reviews
Anthony
6 years of experience
Jeep Grand Cherokee - Check Engine Light is on - Carmichael, California
Anthony was great! We are very happy that we chose to go with this company instead of the overpriced and slow service we get from the Jeep dealership. He was on time and did the job just as expected. He identified a couple of other things that need to be done before the problems get worse. We appreciate having a technician give us direct feedback regarding our vehicle, rather than a service advisor (salesperson) that we've had to deal with in the past at the dealership. We'll be booking the addtional services very soon and will definitely request Anthony again now that he is familiar with our vehicle!

Michael

37 years of experience
113 reviews
Michael
37 years of experience
Subaru Forester - Check Engine Light is on - Santa Fe Springs, California
Michael was punctual and courteous. He knows what he’s doing and I would absolutely recommend him to anyone.

Anthony

6 years of experience
18 reviews
Anthony
6 years of experience
BMW 740Li - Check Engine Light is on - Roseville, California
Very helpful in finding out the fault codes in my bmw 740 li. It was simple fix and that the two tube hose just had to be connected and my drive train malfunction went away. This saved me from having to go the an expensive dealership. Anthony has a good attitude about his work.

Breck

19 years of experience
613 reviews
Breck
19 years of experience
Ram 1500 - Check Engine Light is on - Houston, Texas
Breck did a great job working on my truck. Showed up on time, found any issues I had on my truck and explained everything to me so that I understood what was going on. Went above and beyond, definitely will book him for future appointments.


More related articles

P0343 OBD-II Trouble Code: Camshaft Position Sensor Circuit High Input
P0343 means theres a problem with the camshaft position sensor which has usually been fouled from oil and moisture causing a bad ground or voltage.
P0831 OBD-II Trouble Code: Clutch Pedal Switch "A" Circuit Low
P0831 means the PCM registered a malfunction with the CPS, often caused by its failure or misadjustment, or electrical issues like corrosion.
P0012 OBD-II Trouble Code: Camshaft Position A - Timing Over-Retarded (Bank 1)
P0012 code definition Camshaft Position “A” - Timing Over-Retarded (Bank 1) What the P0012 code means P0012 is the OBD-II generic code...

Related questions

Check Engine code is P0115

Hi. The most common repair for that code is the sensor itself. A low coolant condition can cause it as well so the cooling system will need to be inspected. It will need to be checked for leaks and the...

Why would I have a P0014 code in my 2008 Nissan 350Z

Hello. When you get this code it is because the computer is seeing that the valve timing is off. Most of the time this is a timing solenoid issue. It can also be caused by low engine oil, a sensor...

Difficulty accelerating during cold start

Hey there. The most common causes of the decreased throttle response is due to a torque converter fault or a failing fuel pump. The first thing a technician would do is to check the code to get a better idea...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com