P2300Ignition Coil A Primary Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- 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
- Likely causes
- 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
- RareEngine module driver or software fault (FCA 2023: PCM reflash)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.