P2300 code meaning
Ignition Coil A Primary Control Circuit Low
Powertrain system Generic code P23xx codes Check engine light
What P2300 means
P2300 reports that the control line to ignition coil A is pulled towards ground. GM, Saab and VW assign coil A to cylinder 1. GM's 2019 engine tables check the low-side driver while it is switched off: if the line voltage lies in the band of a short below 100 ohms to ground in 50 of 63 samples (taken every 100 ms, battery above 11 V), the Type A fault turns on the MIL in the first trip. An open line belongs to P0351, a short to supply to P2301, the high-voltage side to P2302, misfire on cylinder 1 to P0301. FCA cured P2300-00 on 2023 Alfa Romeo 2.0 turbo engines with new PCM software. Hino uses the same number for the igniter coil of the exhaust burner on its 2011–2014 trucks. Expect rough running; the module may shut the cylinder off.
P2300 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2300
- Check engine light on
- Misfire and rough running on cylinder 1
- Noticeable loss of power
- Fuel to cylinder 1 cut off by the engine module
Common causes of P2300
- Most likelyCoil A (cylinder 1) with an internal fault pulling the control input to ground
- PossibleControl wire of coil A chafed through and touching engine ground
- PossibleWater or corrosion in the coil A connector
- Less likelyEngine module driver or software fault (FCA 2023: PCM reflash)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ignition coilCoil driverIgnition wiring
What each part of P2300 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 00 | The exact fault in that area. |
What to do next
- Note P2300 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2300
What does P2300 mean?
P2300 means "Ignition Coil A Primary Control Circuit Low". P2300 reports that the control line to ignition coil A is pulled towards ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P2300?
Drive gently and only to a workshop. With P2300 the car can go into limp mode (reduced power) to protect itself.
Will P2300 fail an emissions test?
Yes, it can. P2300 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2300 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2300 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.