FixBuick Lesabre 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 Buick Lesabre it is Sensor (18.2%), 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 Buick Lesabre.
What it actually turns out to be on the Buick Lesabre
| The fix involved | Buick Lesabre* | All vehicles* | Typical cost† |
|---|---|---|---|
| Sensor | 18.2% | 14.2% | $179 – $385 |
| Spark Plugs | 13.4% | 17.4% | $145 – $334 |
| Module / Actuator | 10% | 1.9% | $269 – $507 |
| Thermostat | 9.5% | 6.1% | $119 – $235 |
| Fuel Cap | 8.7% | 3.7% | $46 – $115 |
| Ignition Coil | 8.5% | 10.7% | $163 – $344 |
| EVAP Component | 8.5% | 9.8% | $128 – $270 |
| Oxygen Sensor | 8.2% | 11.7% | $172 – $285 |
| Fuel Filter | 6.5% | 4.4% | $84 – $183 |
| 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 Buick Lesabre 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 Buick Lesabre visits for this complaint — the words as the owner said them, and what it turned out to be.
Buick Lesabre owners said
“Diagnose check engine lite”
“Diag check engine light”
“-check engine light back on”
“Diagnose check engine light on and flashing”
“Diagnostics for malfunction indicator light”
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 Buick Lesabre repair costs
- Buick Lesabre Fluid Leaking
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 Buick Lesabre differs.
Download the Diagnosis Brief (PDF, all vehicles)View it online · Narrow it down step by step
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