P2302 OBD-II Trouble Code: Ignition Coil "A" Secondary Circuit

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2302 code

P2302 is a diagnostic trouble code (DTC) for "Ignition Coil "A" Secondary Circuit". 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 $0.0 . 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.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $0.0 $20.0
Toyota $0.0 $20.0
BMW $0.0 $20.0
SCHEDULE P2302 DIAGNOSTIC Get a fair and transparent estimate upfront

P2302 trouble code code definition

P2302 is a general OBD2 diagnostic trouble code indicating a fault within the ignition coil A secondary circuit. This code may be seen with misfire codes as well as other ignition system codes.

What the P2302 code means

The P2302 code means that the ignition coil A secondary circuit has experienced a malfunction. The malfunction is detected by the vehicle's ECU when it tries to control the secondary ignition circuit. This causes a Check Engine Light to be illuminated on the dashboard and a failsafe mode to be enabled. Once the failsafe mode is enabled it will remain until the fault is resolved or normal operation is observed.

What causes the P2302 code?

  • Spark plugs or plug wiring need replaced
  • Failed ignition coil A
  • ECU failure
  • Short or open in the ignition coil harness
  • Poor or loose electrical connection

What are the symptoms of the P2302 code?

  • Check Engine Light seen on the dashboard
  • Engine misfiring
  • Lack of power or running roughly
  • Reduced fuel milage

How does a mechanic diagnose the P2302 code?

  • A mechanic will begin by hooking up a scan tool to check for any codes stored in the ECU as well as any freeze frame data present. This will all be noted then the codes will be cleared for a fresh start.

  • The vehicle will be test driven in an attempt to duplicate the symptoms.

  • Once the code reappears, a visual inspection will be performed looking for damaged wiring and broken components.

  • Next the spark plug and plug wires will be inspected.

  • The signal to the ignition coil will be checked and then the ignition coil itself will be tested for excessive resistance.

  • Lastly the ECU will be tested.

Common mistakes when diagnosing the P2302 code

  • A common mistake is just replacing the spark plugs without doing any testing and expecting the fault to be resolved. In some cases replacing the spark plugs may fix the fault but definitely not in all cases.

  • All diagnostic steps must be performed in the proper order and in its entirety to diagnose the P2302 code effectively.

How serious is the P2302 code?

The P2302 code can cause misfires and other drivability concerns. If these symptoms are severe the vehicle should not be driven and must be repaired as soon as possible for normal vehicle operation.

What repairs can fix the P2302 code?

Additional comments for consideration regarding the P2302 code

The P2302 code can be extremely difficult to diagnose without the proper tools. One such tool is a professional grade scan tool. The professional scan tool allow access to the data stream for the vehicle which can tell technicians information that would otherwise be unavailable or difficult to obtain.

Need help with a P2302 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.

Check Engine Light
trouble codes
P2302

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2302 code.

SCHEDULE P2302 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6830)

Rating Summary
6333
239
54
37
167
6333
239
54
37
167
 at YourMechanic

Pedro

31 years of experience
54 reviews
Pedro
31 years of experience
Nissan Altima L4-2.5L - Check Engine Light is on - Chicago, Illinois
He came before his time which was awesome. He explained everything to me that was wrong so that I can understand better
 at YourMechanic

Andrew

26 years of experience
19 reviews
Andrew
26 years of experience
Hyundai Elantra L4-1.8L - Check Engine Light is on - Las Vegas, Nevada
Great mechanic. Honest and trusting. Very happy about choosing Your Mechanic, definitely using Andrew for future work.
 at YourMechanic

Richard

35 years of experience
61 reviews
Richard
35 years of experience
Mazda 3 L4-2.3L - Check Engine Light is on Inspection - Port Richey, Florida
Richard was great! He was able to find my problem immediately and offer a solution with in minutes. I would definitely reccomend and request him for my future maintenance needs.
 at YourMechanic

Corey

16 years of experience
239 reviews
Corey
16 years of experience
Honda Civic L4-1.7L - Check Engine Light is on - Kannapolis, North Carolina
Corey is always great at finding the root of the problem and only recommending services that are necessary. I will continue to request Corey to fix my 17 year old car that is prone to issues at over 200,000 miles.


More related articles

P3413 OBD-II Trouble Code: Cylinder 2 Exhaust Valve Control Circuit/Open
Trouble code P3413 is a generic OBD-II powertrain code, often caused by a short to the power, disconnected wires, or a faulty engine control module.
B1923 OBD-II Trouble Code: Air Bag Memory Clear Circuit Short To Ground
B1923 means there is an issue with the airbag system, likely due to a faulty memory module, bad battery, or defective electrical wiring.
P2144 OBD-II Trouble Code: Exhaust Gas Recirculation Vent Control Circuit Low
P2144 code means the powertrain control module has detected a fault with the rate of flow through the exhaust gas recirculation vent control circuit.

Related questions

The check engine light on for my 2005 Chevrolet Avalanche

Hey there, thanks for writing in about your 2005 Chevrolet Avalanche. If the gas cap was loose but then later taken care of, then the light may be due to another issue. You will need to have the Check Engine...

Stalling at red lights, and sputters sometimes when I press the gas.

This may be a sign of a failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the...

Check engine light is flashing and reduces the power of the engine.

If the light is flashing then the computer system should have stored codes as to why the problem is happening. I recommend having the computer scanned by a certified technician, such as one from YourMechanic, to retrieve the codes and...

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