P2300 OBD-II Trouble Code: Ignition Coil A Primary Control Circuit Low

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2300 code

P2300 is a diagnostic trouble code (DTC) for "Ignition Coil A Primary Control Circuit Low". 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 $114.99 . 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P2300 DIAGNOSTIC Get a fair and transparent estimate upfront

P2300 code definition

The P2300 trouble code detects an issue with the primary or secondary control circuit in coil A.

What the P2300 code means

The P2300 code is a generic OBD-II trouble code that signals a problem with the primary or secondary control circuit in ignition coil A, and potentially other ignition coils. The ignition coils are connected to the engine, and utilize a small spark plug wire to ignite the engine. The powertrain control module (PCM) controls each coil electronically, which ensures that ignition occurs optimally. Battery voltage is sent to the ignition coil, which triggers the ignition spark which leads to proper engine ignition timing. When the voltage in the ignition coil circuit varies from the manufacturer’s settings by at least 10 percent, then the P2300 trouble code will be detected.

What causes the P2300 code?

There are a few common causes of the P2300 trouble code:

What are the symptoms of the P2300 code?

When the P2300 trouble code is detected, there will likely be a check engine soon Warning Light on the vehicle’s dashboard. The car also may experience diminished engine performance, and may have rough acceleration and constant misfires during idling. The fuel injector in the specific cylinder that is affected may be shut off as well.

How does a mechanic diagnose the P2300 code?

The P2300 code should be diagnosed with the assistance of a standard OBD-II trouble code scanner. A reputable mechanic will use the scanner to assess the freeze frame data, which the technician can then use to examine the P2300 code, and search for more trouble codes. The trouble codes should then be reset and the vehicle restarted, to see if the codes persist. If the P2300 code does not return, it was triggered erroneously or the issue is intermittent.

If the P2300 code returns after being reset, then the mechanic should Inspect the wires and connectors associated with the ignition coils, searching for damage, corrosion, and any other issues. The mechanic will then inspect the ignition coils themselves, disconnecting and reconnecting them, and looking for visual signs of damage.

After any problems have been found and replaced, the codes should be reset again to make sure that the ignition issue has been resolved. If the issue is not resolved, or no problems were found, then larger issues such as the PCM should be examined.

Common mistakes when diagnosing the P2300 code

The most frequent mistake made when diagnosing the P2300 code is a failure to properly follow the OBD-II trouble code diagnosis protocol. All steps of the protocol should be followed in order, to avoid misdiagnosis, and to have the most efficient diagnosis and repair possible.

A common misdiagnosis comes from assuming that the engine simply needs a general inspection and tune up, rather than an actual ignition coil inspection.

How serious is the P2300 code?

The P2300 trouble code is unlikely to render a car unfit to drive. However, there will be drivability issues due to the likely misfiring, and the driver will likely experience choppy acceleration. While the P2300 code does not signal a severe issue, vehicles with this code detected should be inspected as soon as possible.

What repairs can fix the P2300 code?

Some repairs for the P2300 code include:

Additional comments for consideration regarding the P2300 code

Even though the P2300 code detects a problem with coil A, all ignition coils should be inspected upon diagnosis.

The P2300 trouble code is often accompanied by other ignition coil codes, as well as misfire codes.

Not all vehicles have a coil on plug system, but nearly all OBD-II cars do.

Need help with a P2300 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
P2300

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2300 code.

SCHEDULE P2300 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0927 OBD-II Trouble Code: Gear Shift Reverse Actuator Circuit High
P0927 code means the ECM detected a higher than normal voltage within the gear shift reverse actuator often due too mechanical issues.
P001A OBD-II Trouble Code: "A" Camshaft Profile Control Circuit/Open
P001A means the camshaft and crankshaft signals have malfunctioned which may cause a poorly running engine, reduced power or a no-start condition.
P0673 OBD-II Trouble Code: Cylinder 3 Glow Plug Circuit
P0673 means there are issues with a computer output circuit due to defective glow plug in cylinder 3, in a module or timer and in a relay.

Related questions

EVAP leak needs repairing.
Hi there, the code is a common one. The test procedure involves physically inspecting the canister for fuel. (https://www.yourmechanic.com/services/evaporative-emission-control-canister-replacement) The canister should only house fuel vapors not fuel. If no fuel is present then the purge valve needs to be...
Check Engine Light reveals an incorrect flow on the secondary air injection system
Hello. There are a lot of things that can go wrong with the secondary air injection system on this vehicle. It can be anything from a bad pump to a solenoid. A failing oxygen sensor can also throw off the...
My warning sign is on and I don't know why
Hello. Thank you for writing in. The issue with the vehicle can easily be diagnosed with a vehicle diagnostic scan. To describe this further lets start with the warning light. When the car is turned to the "On" position, the...

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