Engine Diagnostics

Every vehicle manufactured since 1996 comes equipped with an On-Board Diagnostics System. It monitors engine performance, and the computer system reports any performance discrepancies. When the "check engine" or "service engine" light is displayed, you will need an engine diagnostic service or an engine tune-up. Engine diagnostics allow our staff to gather important information about the engine's operating condition and determine what auto repairs are needed.

The most common diagnostic trouble codes are due to malfunctions in the powertrain. Depending on the diagnostic codes we find, our auto repair technicians may replace:
  • Spark plugs
  • Spark plug wires
  • Air filter
  • Fuel filter
  • Distributor cap
  • Rotors during an engine tune-up

Our experts will also check emission levels, fuel lines, belts, and hoses. Ultimately, engine diagnostics and regular engine tune-ups are critical — extending the life of your vehicle and improving your engine's health.

While regular engine maintenance will help ensure that your engine always performs at peak conditions, there are also signs you can look for that indicate an engine repair service is needed. The "check engine" or "service engine" light is a sure sign that your engine should be looked at by an expert as soon as possible. Your vehicle's On-Board Diagnostics System typically detects the engine issue and stores the corresponding repair code. Our auto repair techs can then access those codes to begin an effective automotive repair.

If your engine is:
  • Slow-cranking
  • Rough idling
  • Stalling
  • Knocking
  • Pinging while accelerating Decreasing gas mileage
  • Losing of power during acceleration

Make sure you take your car in for a diagnostic and possible engine repair service ASAP. Engine warning lights help alert drivers to minor issues before they become major repairs. Follow up with our staff once your vehicle's On-Board Diagnostics System detects an engine problem.

Eagle Tire & Auto Repair Center proudly serves the Engine Diagnostics and Performance needs of customers in Helena, Bozeman, MT, and surrounding areas.