U0423 A module received invalid data from the instrument panel control module

Invalid data received from instrument panel control module

Severity not verified — if the car runs badly, have it inspected

The sources show U0423 sets with cosmetic warnings on some cars and with a blank cluster and engine stop on others, so the code alone does not fix how serious it is.

It gets more serious if:

  • Inspect soon: Inspect soon if the instrument cluster goes blank or fluctuates, the engine stops, or several warning lights come on together.

Source: how we rate severity

U0423 in short

U0423 usually means a module got data from the instrument cluster that did not make sense. It is often a software or communication glitch, and on some Mazda and Honda models a software update fixes it. Have it checked soon if the cluster blanks, the engine stops or many warnings appear together.

The instrument cluster sends data to other modules over the network. When a receiving module decides the data is invalid, it stores U0423. The code names the data that failed a check, not necessarily a broken cluster.

Mazda and Honda bulletins describe it with other codes on models with Mazda Connect and on the 2017 CR-V with an Auto High Beam message. A Jeep Compass owner saw it with an A/C that stopped working after service, and a Taurus owner had a blank cluster and an engine stop with U0423:82 stored.

Not every maker uses the code for the same sending module: an FCA bulletin for the Dodge Hornet describes U0423-87 as invalid data from the telematic box module, and the code can set erroneously.

Most likely causes

  1. Module software that needs an update or reflash

    Supported by vehicle data
    Why it ranks here
    Mazda MT-010-18, Honda ATS171001 and FCA S2308000099 are bulletins on specific vehicles that name U0423 with a software or diagnostic remedy.
    What would change this
    Rises on the listed models and years. Falls on other vehicles.

  2. Instrument cluster fault or power loss

    Supported by vehicle data
    Why it ranks here
    A Taurus owner had a cluster go black with the code stored, and a Compass owner saw invalid cluster data with the code.
    What would change this
    Rises when the cluster flickers, blanks or resets. Falls if gauges behave normally.

  3. Low voltage or a network fault that corrupts messages

    Possible — needs testing
    Why it ranks here
    FCA says that multiple lost-communication codes can follow a battery or TCM fault, but U0423 itself is only one of the listed codes.
    What would change this
    Rises when many modules log faults together. Falls if only U0423 is stored.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all modules and note whether other lost-communication or cluster codes are stored with U0423, and whether the cluster flickers or resets.

    Low riskTool: scan tool that reads all modules

  2. Check battery condition and charging, then ask a technician to test the cluster power, ground and network wiring.

    Use cautionTool: multimeter and scan tool

    Warning:Disconnect the battery before touching module connectors. Do not probe airbag circuits.

Symptoms

  • Auto High Beam or driver-information message
  • Cluster goes blank or resets Gets more serious: stop and have it checked.
  • Engine stops while driving Gets more serious: stop and have it checked.
  • TPMS, traction or stability lights stay on

How to fix

  1. Check that the battery is healthy, then clear the codes and see if U0423 returns.

  2. Ask a dealer whether a software bulletin exists for your exact vehicle.

On your vehicle

Mazda

  • MT-010-18Status unverified

    DTC U0323 / U0423 / U3000 cannot be deleted (Mazda Connect)

    2014–2019mazda3, mazda6, cx-3, cx-5, cx-9, mx-5 · NHTSA 10152371

    Covers codes that will not clear when the TPMS light flashes and the TCS or DSC lights are on. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Honda

  • ATS171001Status unverified

    Auto High Beam problem message with DTC U0423-68

    2017cr-v · NHTSA 10119589

    Tech line summary of an issue under investigation. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Dodge

  • S2308000099Status unverified

    BCM sets U0423-87 invalid data from TBM

    2023–2024hornet · NHTSA 10243158

    The body control module erroneously sets the code for a missing telematic box message. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Jeep

  • 9100641Status unverified

    Shifter loss-of-communication DTCs, U0423 among them

    2024–2026grand-cherokee, grand-cherokee-l, wagoneer, grand-wagoneer · NHTSA 11021842

    Check battery health, voltage and the TCM before blaming the shifter module. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Ford

  • U0415A module received invalid data from the anti-lock brake (ABS) module

    Same system Supported by vehicle data

    U0415 was stored with U0423 on a 2017 Taurus and is listed with it in an FCA bulletin.

  • U0402A module received invalid data from the transmission computer

    Same system Possible — needs testing

    U0402 and U0423 are listed together in the FCA shifter loss-of-communication bulletin.

All Module network (CAN bus) communication codes

Sources and review

  1. Mazda MT-010-18 (NHTSA 10152371): DTC U0323/U0423/U3000 cannot be deleted — NHTSA (manufacturer communication)
  2. Honda ATS171001 (NHTSA 10119589): Auto High Beam problem message with DTC U0423-68 — NHTSA (manufacturer communication)
  3. NHTSA complaint ODI 1560979: 2017 Ford Taurus — NHTSA (owner complaint)
  4. NHTSA complaint ODI 2127680: 2018 Jeep Compass — NHTSA (owner complaint)
  5. FCA S2308000099 (NHTSA 10243158): BCM sets U0423-87 invalid data from TBM — NHTSA (manufacturer communication)
  6. FCA 9100641 (NHTSA 11021842): electronic shifter loss-of-communication codes on 2024-2026 Grand Cherokee and Wagoneer — NHTSA (manufacturer communication)
Last reviewed
Written by
Saurabh K.
Editorial review
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Technician review
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