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Our automotive experts have put together the following information about the P0194 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0194 code.

OBD II Fault Code

  • OBD II P0194

    OBD-II Code Decreased engine performance is defined as a Fuel Rail Pressure Sensor "A" Circuit Intermittent/Erratic

    The engine control module (PCM) uses a fuel rail pressure sensor to know how much pressure is going to the fuel injectors. This is so the PCM can effectively control the amount of fuel going through the fuel injectors to maintain desired power and fuel efficiency. If the PCM detects an erratic signal from the fuel pressure sensor, it will set code P0194.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P0194 Code

    • Powertrain Control Module (PCM) failure
    • Pressure sensor failure
    • Wiring issue

    Common Repairs Needed for the P0194 Code

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