P0351 on Kia
Ignition Coil A Primary/Secondary Circuit Malfunction
P0351 on Kia vehicles indicates ignition coil a primary/secondary circuit malfunction. Au7o has documented this code across 1 Kia model — most commonly on Rio. P0351 indicates the engine computer found a fault in the primary or secondary circuit of ignition coil 'A' (typically the coil for cylinder 1 or the first coil in the firing system). The PCM monitors the coil's control circuit, and when the electrical feedback doesn't match what it expects during firing, it sets this code. Because the coil creates the high-voltage spark, this often causes a misfire, rough idle, hesitation, or loss of power. It is a circuit/component fault for one specific coil rather than a general engine problem. Typical repair costs on Kia range from $120 to $600, depending on the specific model and root cause.
Common Causes of P0351
- •Failed or weak ignition coil
- •Damaged or corroded coil connector or pigtail
- •Broken or shorted wiring in the coil control circuit
- •Loss of power feed or ground to the coil
- •Worn or fouled spark plug overloading the coil
- •Failed coil driver inside the PCM/ECM
P0351 on Kia by Model
Kia Rio(1 issue)
- Ignition Coil and Plug Wire Failure Causing Misfire, Hesitation, and Check Engine Light2001-2011
Across both generations of Rio, owners frequently report ignition-related misfires caused by failing coil packs, deteriorated plug wires on earlier cars, or worn spark plugs. The problem typically shows up as rough idle, hesitation under load, flashing MIL, and poor fuel economy. It is common enough in owner complaints and repair forums to be considered a recurring Rio issue, especially as these cars age.
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View P0351 across all makes →Frequently Asked Questions
What does P0351 mean on Kia?▼
P0351 stands for "Ignition Coil A Primary/Secondary Circuit Malfunction." P0351 indicates the engine computer found a fault in the primary or secondary circuit of ignition coil 'A' (typically the coil for cylinder 1 or the first coil in the firing system). The PCM monitors the coil's control circuit, and when the electrical feedback doesn't match what it expects during firing, it sets this code. Because the coil creates the high-voltage spark, this often causes a misfire, rough idle, hesitation, or loss of power. It is a circuit/component fault for one specific coil rather than a general engine problem. On Kia specifically, this code is documented across 1 model.
What causes P0351 on Kia vehicles?▼
Common causes on Kia: Failed or weak ignition coil, Damaged or corroded coil connector or pigtail, Broken or shorted wiring in the coil control circuit, Loss of power feed or ground to the coil, Worn or fouled spark plug overloading the coil. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0351 on a Kia?▼
Repair costs on Kia range from $120 to $600, depending on the specific model and root cause.
Which Kia models have P0351 documented?▼
Au7o has documented P0351 on 1 Kia model: Rio.