FixFord F-350 Check Engine Light On — What It Usually Means, and What It Costs
Across all vehicles, the most common cause of a check engine light is Spark Plugs (17.4%). On the Ford F-350 it is Fuel Filter (21.2%), so the order of suspects is different for this vehicle. The table below shows each fix for this vehicle next to the all-vehicle share, with what it costs on the Ford F-350.
What it actually turns out to be on the Ford F-350
| The fix involved | Ford F-350* | All vehicles* | Typical cost† |
|---|---|---|---|
| Fuel Filter | 21.2% | 4.4% | $253 – $528 |
| Sensor | 19.1% | 14.2% | $227 – $575 |
| Exhaust Component | 10.3% | 4% | $166 – $503 |
| Fuel Injectors | 8.6% | 2.8% | $555 – $1,350 |
| Spark Plugs | 6.8% | 17.4% | $222 – $719 |
| EGR Valve | 6.5% | 3.9% | $337 – $850 |
| Ignition Coil | 6.4% | 10.7% | $203 – $455 |
| Module / Actuator | 4.1% | 1.9% | $324 – $1,043 |
| Valve Cover Gasket | 3.6% | 3.6% | $306 – $755 |
| Other, rarer causes | smaller shares | — | varies |
*Share of visits whose repair involved this part, among visits for this complaint that ended in a parts repair. Combined
repairs count toward each part involved, so shares overlap and don't add up to 100%.
†Middle half of real Ford F-350 invoices (25th–75th percentile) when this was the only fix, parts + labor; rows marked "all vehicles" use all vehicle types.
Real repair reports
Recent, paid Ford F-350 visits for this complaint — the words as the owner said them, and what it turned out to be.
Ford F-350 owners said
“Diagnose check engine lite”
“Diagnose check engine light”
“Check engine light diaganostic”
More on this problem and this vehicle
- Check Engine Light On: all vehicles — how to tell the causes apart, and what each fix usually costs
- All Ford F-350 repair costs
- Ford F-350 Won't Start
- Ford F-350 Oil Leak
- Ford F-350 Coolant Leak
Take this to the shop
The FixDozer Diagnosis Brief for this complaint puts the all-vehicle odds on one printable sheet. Bring it with this page: the table above shows how the Ford F-350 differs.
Download the Diagnosis Brief (PDF, all vehicles)View it online · Narrow it down step by step
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