P0358 OBD-II Trouble Code: Ignition Coil H Primary/Secondary Circuit Malfunction

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0358 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0358 code

P0358 is a diagnostic trouble code (DTC) for "Ignition Coil H 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 $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 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$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0358 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P0358 code definition

If the PCM (powertrain control module) fails to receive a valid pulse signal from ignition coil H, it will store a P0358 code and illuminate the Check Engine Light.

What the P0358 code means

The PCM continuously monitors the input signals from all of the engine’s ignition coils so that it can properly predict engine activity and provide the best strategies for ignition timing and fuel delivery. If an ignition coil is malfunctioning and/or is not sending the proper signal, the PCM will store this code because it is not getting the necessary information to perform these functions.

What causes the P0358 code?

A number of underlying problems can cause a P0358 code to be detected. These include:

  • A defective ignition coil
  • An open or shorted ignition coil circuit
  • A poor electrical connection to the ignition coil
  • A defective PCM (rare)

What are the symptoms of the P0358 code?

The only consistent symptom noted in all cases of a P0358 being detected is the illumination of the Check Engine Light. Other than this, you may also notice:

  • Engine runs rough at idle
  • Difficulty starting the engine
  • Lack or loss of power when accelerating
  • Engine hesitation when driving

How does a mechanic diagnose the P0358 code?

After using an OBD-II scanner to determine that a P0358 code has been stored, a mechanic will start by visually inspecting and examining the affected ignition coil, its circuits, wiring, and connections. If no obvious faults or damage are found, they will then swap the ignition coil pack with a good coil pack from another cylinder. They’ll then clear the code and retest the system. If the trouble code follows the coil pack to the new cylinder, then the ignition coil is the problem and should be replaced.

After completing all diagnostic steps and repairs, the mechanic will clear the code(s) again and take a test drive to determine whether or not the code has been thoroughly resolved.

Common mistakes when diagnosing the P0358 code

If the proper diagnostic steps aren’t taken, it is easy to assume that the ignition coil is to blame when it could be a loose electronic connection or another issue. With proper and thorough inspection of all possible causes, you can be sure that your repair(s) will actually fix the problem instead of wasting time and money.

How serious is the P0358 code?

The initial symptoms associated with a P0358 code may not be severe, but if the problem goes on long enough, it can result in engine pinging, engine knocking, and other problems. These can cause engine misfiring issues and other, more severe symptoms and issues that can do permanent engine damage and/or put you in a dangerous situation while driving.

What repairs can fix the P0358 code?

The right repair(s) will depend on what exactly is causing the PCM to detect and store the P0358 code. These include:

  • Replacing the ignition coil
  • Repairing a loose electrical connection to the ignition coil
  • Replacing the wiring and/or connectors for the ignition coil circuit
  • Replacing or reprogramming the PCM (rare)

Additional comments for consideration regarding the P0358 code

Whether or not your vehicle displays any or all of the symptoms listed above, it’s important to remember that to pass an OBD-II emissions test, your vehicle must not have any warning lights (including the Check Engine Light) illuminated. If you attempt to get an emissions test before resolving this issue, your vehicle will fail and you will have to get the issue resolved before paying to take it again.

Need help with a P0358 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.

P0358
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0358 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,636

Rating Summary
3,315
161
42
24
94
3,315
161
42
24
94

David

37 years of experience
7 reviews
David
37 years of experience
David is AWESOME! He managed to troubleshoot misleading code errors and get to the root of the problem quickly. I know that if I'd gone to the dealer or a shop, I likely would have been fleeced for unnecessary work due to the codes that were thrown by my car. We will be requesting him in the future for all of our cars' needs. Thanks David!
2008 SATURN OUTLOOK - CHECK ENGINE LIGHT IS ON - TUCSON, ARIZONA

John

24 years of experience
266 reviews
John
24 years of experience
never rated you before?
2000 PORSCHE BOXSTER - CHECK ENGINE LIGHT IS ON - PEARLAND, TEXAS

Chris

19 years of experience
1240 reviews
Chris
19 years of experience
Excellent!
1996 CHEVROLET CAMARO - CHECK ENGINE LIGHT IS ON - ANAHEIM, CALIFORNIA

Michael

13 years of experience
379 reviews
Michael
13 years of experience
I had a couple issues with my car, and Michael took his time to explain everything to me and what it is that he had to do. He's very friendly and gets the job done. I'm glad I found him!
2008 NISSAN XTERRA - CHECK ENGINE LIGHT IS ON - ALPHARETTA, GEORGIA

More related articles

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...

Related questions

Q: wont go faster 35mph

If the Check Engine Light is on this would be helpful as the codes that would be triggered by this would generate useful information relating to the problem. Without the benefit of hooking the car up to a scanner and...

Q: I took my car in for a full service today. They did the service and my car suddenly cannot be driven. What could the issue be?

Hi there. If the code came on for the camshaft position sensor, then the computer has seen that the sensor is not working properly. If the vehicle was working before and now has the code for the camshaft position sensor,...

Q: Car hesitating on acceleration.

Thanks for writing in about your Mazda 6. You need to make sure that the mass airflow sensor is not getting contaminated by an oil type air filter. If it is, replace the air filter with clean paper type one...

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.

1-800-701-6230 · hi@yourmechanic.com