Powertrain, generic (extended)

P2300 Ignition Coil A Primary Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Coil A (cylinder 1) with an internal fault pulling the control input to ground
Control wire of coil A chafed through and touching engine ground
Water or corrosion in the coil A connector
Engine module driver or software fault (FCA 2023: PCM reflash)

Symptoms

  • 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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–400
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition coilcoil driverignition wiring

Related codes

P2301P2302P0351P2303P0301P0300

References: gsi.ext.gm.com, saabwisonline.com, newtonnet.co.uk, static.nhtsa.gov.