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ECU: Engine Repair

A vehicle's engine control unit, or ECU, is like the brain: it senses many different engine components and alerts the driver if something is functioning incorrectly. When the ECU is defective, the engine stops running normally and starts having issues with starting, staling, and shifting.

ECU Repair FAQs

The Engine Control Unit, or ECU, in your vehicle is what monitors the different components of your engine and alerts you when something is malfunctioning or faulty. If your ECU, Power Control Module (PCM) or Fuel Injector Control Module (FICM) is faulty, it may alert you that something is wrong with your engine when it isn't, and can cause a whole host of problems for your engine.

What are some common ECU issues?

If you notice any of these signs, your ECU may be faulty:

- Check engine light is on
- Engine stalls or misfires

- Erratic transmission shifts
- Hard shifts between 1st and 2nd gear

- Rough, high or erratic idle

- Vehicle won't start

- Vehicle is slow to start

- Large drop in fuel economy

- Transmission slips a gear