Powertrain, generic (extended)

P2302 Ignition Coil A Secondary Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2302 looks at the high-voltage side of coil A – the secondary winding, the boot and the spark plug of cylinder 1 – rather than at the control line covered by P2300 and P2301. Only a few makers use it. FCA does on the 3.6-litre Pentastar V6 in 2015–2016 Dodge Caravan and Chrysler Town & Country vans, where the code name speaks of too little ionization on the secondary side of coil 1: the module judges combustion from the ion current across the plug gap, and a weak signal means the spark did not light the mixture properly. Bulletin 18-069-16 replaced the PCM on vans built between 27 July and 11 September 2015. Ford, by contrast, leaves even primary winding faults of its coil-mounted drivers to the misfire monitor, so they show up as P0301 or P0300. If misfire reaches a catalyst-damaging rate, CARB requires a flashing MIL.

Likely causes

Worn or fouled spark plug in cylinder 1, gap too wide
Cracked coil boot letting the spark jump to the cylinder head
Secondary winding of coil A breaking down
Ion-sense evaluation in the PCM (FCA 18-069-16: PCM replaced)

Symptoms

  • Check engine light on
  • Misfire on cylinder 1, often together with P0301
  • Rough idle and hesitation

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–900
Time0.3–3 h

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

Parts involved

ignition coilspark plugspark plug wire

Related codes

P2300P2301P2305P0301P0300P0351

References: static.nhtsa.gov, newtonnet.co.uk, en.wikipedia.org, law.cornell.edu.