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Error code reference

Kenmore Dishwasher Error Code 2-2

User interface cannot communicate with main control; loose user interface connection or wrong control…

Kenmore codesKenmore dishwasher codes

User interface cannot communicate with main control; loose user interface connection or wrong control installed.

First step from the service manual

Unplug dishwasher or disconnect power. Check connections between LCD display module and P1C connector on the control. Check for 5VDC from P1C-2 to P1C-4.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 2-2 means on a Kenmore dishwasher

Error code 2-2 on a Kenmore dishwasher indicates that the main control board has lost communication with the user interface (UI) board, which is the panel containing the buttons and LCD display. The control board monitors a data line between itself and the UI and triggers this code when it cannot establish or maintain a valid signal. The diagnostic focus is the P1C connector on the main control, specifically whether 5VDC is present between pins P1C-2 and P1C-4, which is the reference voltage the UI board requires to operate.

For homeowners, think of the user interface board and the main control board as two computers that must talk to each other. When your dishwasher shows 2-2, it means one of those two boards is not receiving or sending the signal it expects. This can happen because a wire connector worked itself loose over time from vibration, because a control board was replaced with an incompatible part, or because one of the boards has actually failed. The good news is that a loose connector is a free fix requiring no parts, and this is the first thing to check before assuming any hardware has failed.

Source: manufacturer service documentation.

Common causes of 2-2

  1. 01

    Loose or disconnected P1C connector

    Wiring / connection

    Vibration from normal dishwasher operation can cause the wire harness connector at P1C on the main control board to loosen or back out partially, breaking the communication signal between the main control and the LCD display module. Reseating this connector fully resolves the error in many cases.

  2. 02

    Damaged or corroded wire harness between UI and main control

    Part replacement

    The ribbon cable or wire harness running from the LCD display module to the P1C connector can develop broken wires, pinched sections, or corroded terminals, preventing the 5VDC reference voltage and data signal from reaching the UI board.

  3. 03

    Incompatible or incorrect main control board installed

    Part replacement

    If the main control board was recently replaced, an incompatible part number may have been used. A control board that does not match the dishwasher model will fail to recognize or communicate with the original user interface board, triggering a persistent 2-2 code regardless of connection quality.

  4. 04

    Failed user interface board

    Part replacement

    If the 5VDC supply between P1C-2 and P1C-4 is confirmed present and all connections are secure, the LCD display module itself may have failed internally and is no longer able to communicate over the data line.

See the test procedure for each cause

Frequently asked questions about 2-2

What does error code 2-2 mean on a Kenmore dishwasher?
Error code 2-2 means the main control board cannot communicate with the user interface board, which houses the LCD display and control buttons. The most common reasons are a loose wire harness at the P1C connector on the main control, a damaged cable between the two boards, or an incompatible control board installed during a prior repair. Checking the P1C connector first costs nothing and resolves the issue in many cases.
How do I fix error code 2-2 on a Kenmore dishwasher?
Start by unplugging the dishwasher or shutting off the circuit breaker. Access the main control board and firmly reseat the connector at the P1C port. Restore power and check whether the code clears. If it returns, use a multimeter to verify 5VDC between pins P1C-2 and P1C-4. No voltage at those pins points to a failed main control board; correct voltage with the code still present points to a faulty UI board or harness.
Can I still use my Kenmore dishwasher when it shows error code 2-2?
No. When error code 2-2 is active, the main control and user interface cannot communicate, which means the control panel will not function reliably or at all. The dishwasher will not complete a normal cycle in this state. Do not attempt to operate it until the connection issue is resolved, as operating with a broken control communication link can result in incomplete cycles or unexpected behavior.
How much does it cost to fix a Kenmore dishwasher error code 2-2?
If the cause is only a loose P1C connector, the repair costs nothing beyond your time. A replacement wire harness typically runs $20 to $60 depending on the model. A new user interface board generally costs $80 to $150 in parts, and a main control board runs $100 to $200. Professional labor for a dishwasher control repair usually adds $100 to $200 to the total, so DIY diagnosis and repair on this code can save significant money if you are comfortable working with appliance electronics.
Was the wrong control board installed if my Kenmore dishwasher shows 2-2 after a repair?
Yes, this is a documented cause of the 2-2 code. If the error appeared immediately after a main control board replacement, verify that the part number on the installed board matches what the dishwasher model requires. Even boards that look physically identical may have different firmware or connector pinouts that make them incompatible with the original LCD display module. Cross-reference the model and part numbers before purchasing a replacement control board to avoid this issue.

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