P0890 Code - TCM Power Relay Sense Circuit Low

Discussion in 'P - Powetrain Codes' started by fault code, Mar 28, 2018.

  1. fault code

    fault code Administrator Staff Member

    May 11, 2017
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    What does P0890 Mean?

    Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above. When you see P0890 engine fault code on your engine code reader this description will help you.

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    What are the common causes of P0890 ?

    By far the most common cause of this code is from a defective traction control ON/OFF switch. Liquids spilled into the traction control switch are a very common cause of this type of failure.. Other causes may include open, shorted, corroded, or otherwise damaged wiring and/or electrical connectors. Technicians also report the presence of excessive corrosion in the sensor connector as the cause of this code being stored.


    How do you troubleshoot P0890 ?

    Repairing a P0890 trouble code requires a mechanic to do the following:
    • Replace any faulty or damaged wiring, connectors, or components.
    • If replacing wiring in the CAN Bus harness, the mechanic might be better served replacing the whole harness as opposed to individual wires.
    • Replace any faulty control modules, including the traction control module if faulty.

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