P2320 OBD-II Trouble Code: Ignition Coil G Secondary Circuit

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

SCHEDULE P2320 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2320 code

P2320 is a diagnostic trouble code (DTC) for "Ignition Coil G 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 $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 P2320 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2320 code definition

Ignition Coil G Secondary Circuit

What the P2320 code means

P2320 is an OBD-II generic code for the engine control module (ECM) detecting ignition coil G or 7 secondary circuit having low ionization. This means that the coil’s spark is not lasting long enough.

What causes the P2320 code?

  • The spark plug coil secondary circuit (to include the coil, coil boot or the spark plug) is shorted or open causing excessive resistance in the coil secondary circuit.

  • The coil primary has internal shorted windings and causes the secondary voltage to be low.

  • The primary return wiring is shorted to ground or there is a cut in the harness back to the ECM.

What are the symptoms of the P2320 code?

  • The Check Engine Light will be illuminated and the P2320 code set in ECM memory as a fault.

  • The engine will run rough or misfire.

  • The engine may run pretty good and then all of a sudden run very rough when the short occurs.

  • The engine may only misfire under a load when the secondary voltage needs to be its highest.

How does a mechanic diagnose the P2320 code?

  • Scans for codes and documents them in the ECM then looks at the freeze frame data for failure

  • Checks the coil for carbon tracking, cracks or the wiring harness having been cut into, causing the short

  • Checks the coil output with a spark checker

  • Removes the coil connection and tests the coil for shorted primary windings

  • Checks the wiring harness for shorts or open circuits from coil to the ECM

  • Checks the spark plug for cracks or a worn electrode

Common mistakes when diagnosing the P2320 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so that the failure may be duplicated and repaired.

  • Trying to test the coil without a spark tester. This may burn out the ECM coil driver if a proper tool is not used.

How serious is the P2320 code?

Code P2320 is a code indicating that the coil secondary spark is not good enough. This may be due to the plugs being worn or cracked. This can also be due to spark grounding inside the head through the plug boot or the coil itself.

What repairs can fix the P2320 code?

Additional comments for consideration regarding the P2320 code

Code P2320 is caused most commonly from an internal coil primary circuit short or open windings. The failure may burn out the ECM coil driver. If the coil and ECM are not replaced at the same time, the ECM may get burned out; it should be replaced with a new coil. Always check the coil primary and secondary resistance for problems if replacing the ECM. It is also recommended to replace the spark plug boot and plug.

Need help with a P2320 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.

P2320
trouble codes
Check Engine Light

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

SCHEDULE P2320 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

3,936

Rating Summary
3,597
169
44
25
101
3,597
169
44
25
101

Jonathan

32 years of experience
238 reviews
Jonathan
32 years of experience
Very nice and freindly, really helped me out alot and went tge extra mile to repair my car. Wayyy better then going to regular mechanic. 10/10
2004 VOLVO S60 - CHECK ENGINE LIGHT IS ON INSPECTION - TAMPA, FLORIDA

Steven

18 years of experience
198 reviews
Steven
18 years of experience
Steven called me and asked if it was okay for him to arrive early for the appointment. When he arrived, he greeted me with a good handshake and a smile while he introduced himself to me. After verifying what was wrong with my pickup, he started in right away diagnosing the problem. After the diagnosis was performed, he told me what the problem was and proceeded to fix it. He was very professional and knowledgeable about my truck. He fixed the problem in what seemed like a very short time and had me test drive the truck. The problem was fixed and I am a very satisfied customer. Steven is a great asset and representative of Your Mechanic. I will definitely ask for Steven the next time I use your company. sincerely, James J. Ward
2000 CHEVROLET SILVERADO 1500 - CHECK ENGINE LIGHT IS ON - FORT WORTH, TEXAS

Paul

16 years of experience
120 reviews
Paul
16 years of experience
Paul was helpful in diagnosing the problems with my car and answered all the questions I had. This was my first time using Your Mechanic; it went well and wasn't intimidating at all.
2006 AUDI A4 - CHECK ENGINE LIGHT IS ON - TAMPA, FLORIDA

William

17 years of experience
118 reviews
William
17 years of experience
William was very professional and helpful.
2013 JEEP WRANGLER - CHECK ENGINE LIGHT IS ON - NAPLES, FLORIDA

More related articles

How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...

Related questions

Q: Honda N WGN 660 5cc japanese frequent limp home mode

Hello, thanks for writing in about your Honda N WGN. A likely possibility related to the misfiring may be that the car's computer may have tried to recalibrate the fuel supply as a result of the faulty throttle control relay...

Q: P0328 code - 2008 Hyundai Accent

Hello. P0328 is the code for a knock sensor. If the knock sensor fails, or there is an issue with the wiring, the code may be set off. You also mention that the Check Engine Light was not on. If...

Q: the car wont pass emmissions the code po420 comes up

Fault code P0420 indicates the catalytic converter is operating below proper efficiency. There are two oxygen (O2) sensors in the exhaust system. One just before and one just after the catalytic converter. The ecu reads the first O2 sensor to...

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