FixChevrolet Impala 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 Chevrolet Impala it is EVAP Component (28.1%), 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 Chevrolet Impala.
What it actually turns out to be on the Chevrolet Impala
| The fix involved | Chevrolet Impala* | All vehicles* | Typical cost† |
|---|---|---|---|
| EVAP Component | 28.1% | 9.8% | $173 – $336 |
| Sensor | 17.1% | 14.2% | $159 – $369 |
| Fuel Cap | 9.1% | 3.7% | $42 – $147 |
| Spark Plugs | 8.6% | 17.4% | $202 – $454 |
| Oxygen Sensor | 6.4% | 11.7% | $192 – $333 |
| Thermostat | 5.6% | 6.1% | $172 – $343 |
| Module / Actuator | 4.5% | 1.9% | $185 – $434 |
| Exhaust Component | 3.8% | 4% | $75 – $265 |
| Ignition Coil | 3.7% | 10.7% | $211 – $443 |
| 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 Chevrolet Impala 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 Chevrolet Impala visits for this complaint — the words as the owner said them, and what it turned out to be.
Chevrolet Impala owners said
“Diagnose check engine light”
“Check engine light is back on”
“Check engine light on has evap code”
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 Chevrolet Impala repair costs
- Chevrolet Impala Fluid Leaking
- Chevrolet Impala Won't Start
- Chevrolet Impala Oil 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 Chevrolet Impala differs.
Download the Diagnosis Brief (PDF, all vehicles)View it online · Narrow it down step by step
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