Q: The engine light just started blinking and it would jerk once I've accelerated to 20 mph.

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I have a 2005 Chrysler Pacifica. The engine light just started blinking and it would jerk once I've accelerated to 20 mph. Then it would drive. Why is this happening?

My car has 128000 miles.
My car has an automatic transmission.

Based upon the symptoms you are describing, it sounds like you may have a faulty camshaft position sensor. The camshaft position sensor is a magnetic sensor that monitors camshaft speed to regulate ignition timing and fuel injection timing. It gathers and sends information about the car’s camshaft speed to the car’s electronic control module. This information is used by the computer to further calculate the time of ignition and the timing of fuel injection required by the engine. When this is not working properly, you may experience a drop in power, poor idling, poor fuel mileage and problems starting the vehicle. As the sensor begins to fail and gets worse over time as the signal it provides to the computer weakens. I would recommend having a professional from YourMechanic come to your location to diagnose your [camshaft position sensor](https://www.yourmechanic.com/services/camshaft-position-sensor-replacement.

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