Our automotive experts have put together the following information about the P0169 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 P0169 code.

OBD II Fault Code

  • OBD II P0169

    OBD-II Code Decreased engine performance is defined as a Incorrect Fuel Composition

    vehicle's that are capable of running off of varying levels of ethanol (Flex Fuel, E85), will have a Fuel Composition Sensor in the fuel system so that the engine control module (PCM) can determine the fuel composition and adjust the fuel delivery accordingly. If the fuel composition is incorrect for the vehicle to be able to run without damaging the engine or other components, the PCM will set code P0169.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Engine may not start
    • Increased fuel consumption

    Common Problems That Trigger the P0169 Code

    • Fuel composition sensor failure
    • Fuel contamination
    • The fuel does not meet the manufacturer's requirements
    • Powertrain Control Module (PCM) software needs to be updated
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