P0351 OBD-II Trouble Code: Ignition Coil "A" 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 P0351 code

P0351 is a diagnostic trouble code (DTC) for "Ignition Coil "A" 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 P0351 DIAGNOSTIC Get a fair and transparent estimate upfront

P0351 code definition

P0351 is a general OBD2 diagnostic trouble code (DTC) that points to a fault with the ignition coil A.

What the P0351 code means

The P0351 DTC is seen when the ignition coil A primary or secondary circuit has a malfunction. The engine control module is looking for specific signals from the ignition coil A and when these signals are not seen the ECU sets the Check Engine Light. The Check Engine Light will be illuminated on the dashboard.

What causes the P0351 code?

  • Faulty spark plugs or plug wiring
  • Defective ignition coil
  • Failed or failing ECU
  • Open or short in the coil wiring harness
  • Electrical connection that is poor

What are the symptoms of the P0351 code?

  • Check Engine Light illuminating on dashboard
  • Engine is misfiring
  • Vehicle is hard to start
  • Engine has a lack of power, especially under heavy load
  • Erratic or rough idle

How does a mechanic diagnose the P0351 code?

  • Uses a scanner to check what codes are stored in the ECU, along with any freeze frame data for the codes

  • Clears the codes and test drives the vehicle under similar conditions found in the freeze frame data to best duplicate the faults

  • Performs a visual inspection on the coil system and it's wiring, looking for any damaged or worn components

  • Uses scan tool to monitor he data stream information and determine if the fault is with a specific cylinder or all of the cylinders

  • Inspects the spark plug wire and plug, or the coil pack of the vehicle if the fault is with just one cylinder

  • Tests the primary ignition coil for proper operation if all of the cylinders are faulty

  • Tests the ECU if no fault is found up until this point

Common mistakes when diagnosing the P0351 code

Mistakes are made when components are replaced without being test or all steps are not followed completely in the proper order. This wastes time and money for repairs.

How serious is the P0351 code?

The P0351 code can have some drivability symptoms that will not make it safe to drive depending on how severe the symptoms are. This code should not prevent the vehicle from being able to be driven to a safe location but should still be repaired ASAP for normal vehicle operation.

What repairs can fix the P0351 code?

  • Replacing the spark plugs and spark plug wiring
  • Replacing the ignition coil
  • Repairing the wiring harness
  • Repairing the electrical connection fault
  • Replacing the ECU

Additional comments for consideration regarding the P0351 code

The ability to view the live data stream of the vehicle is very important for the success of diagnosing the P0351 code. This aids technicians is finding intermittent faults that they would otherwise have no ability to noticed.

Need help with a P0351 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
P0351
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0351 code.

SCHEDULE P0351 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

5,170

Rating Summary
4,765
197
50
27
131
4,765
197
50
27
131

Fred

16 years of experience
364 reviews
Fred
16 years of experience
Mercedes-Benz E500 - Check Engine Light is on - Conroe, Texas
Fred was very friendly and thorough to get to the root of the issue. Even when he could not find a fault to why my engine light was on, he went above and beyond to make absolutely sure that the concern was minimized. Turns out, all that needed to be done was a reset but his diagnostic to address my issues was very intricate and appreciated.

David

17 years of experience
37 reviews
David
17 years of experience
Chevrolet Cruze - Check Engine Light is on - Aurora, Colorado
David was on time, professionalisms & honest! I would definitely request him again and pass along to friends/family.

John

18 years of experience
18 reviews
John
18 years of experience
Dodge Ram 1500 - Check Engine Light is on - Memphis, Tennessee
Demonstrated good integrity. Advised me when work I thought needed done was unnecessary and was helpful in identifying issues that needed to be addressed

Robert

21 years of experience
17 reviews
Robert
21 years of experience
Chrysler 200 - Check Engine Light is on - Fort Worth, Texas
Robert did a good job working on my car and letting me know what's needed to keep my car driving smoothly.


Related questions

What is the code P0352 and P0351

Hello. The codes you are receiving are telling you the circuitry for those cylinders is faulty. Taking the corrective measures you have thus far were great, and they allow us to proceed with further inspection of other components. You will...

2004 Mazda 2 DY3W ODB II reader error codes P0031,P0841,P0351,P0733,P0715....what needs to be repaired?

I will explain each code in turn. To resolve all codes, the recommended service to request is a check engine light diagnostic. If you request that service, the responding certified mechanic will get this taken care of for you. ...

Check Engine code P0351

Hi there. This code is set when the PCM detects a fault in ignition coil #1. There are 6 coils in your vehicle. The problem may be the coil itself or it may be a wiring issue. Diagnostic information along...

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of...
P0321 OBD-II Trouble Code: Ignition/Distributor Engine Speed Input Circuit Range/Performance
P0321 P0321 code definition Ignition/Distributor Engine Speed Input Circuit Range/Performance What the P0321 code means P0321 is an OBD-II generic code that the engine control module (ECM) detected the engine speed input sensor circuit out of range or its performance...
P0666 OBD-II Trouble Code: PCM/ECM/TCM Internal Temperature Sensor Circuit
P0666 means that a circuit failure has caused a potentially catastrophic overheating condition in a sensor due to defective or shorted control module.

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