U0423 code meaning
Invalid Data Received From Instrument Panel Cluster Control Module
Network system Generic code U04xx codes Check engine light
What U0423 means
The instrument cluster does more than display: it sends outside temperature, display and chime status or confirmations from its menus to other units. U0423 marks cluster frames that arrive but fail the receiver's checks. In GM's 2025 driver assistance controller EOCM3, 8 of 10 bad frames on chime state, display status or speed limit confirmations set a Special Type C fault that turns adaptive cruise off. Volkswagen's 2014 Touareg book has the engine controller log U0423 when the cluster still reports the ambient temperature start value FEh. Toyota's T-SB-0270-17 for the 2017 iA lists U0423 in the ABS with U0323 and U3000 when battery or display was disconnected; TPMS and TCS/DSC lamps stay on. Honda saw U0423-68 with an auto high beam message on the 2017 CR-V. Ford's 2014 list marks it MIL. U0155 is lost contact.
U0423 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0423
- Stability, tire pressure or assistance warnings that cannot be cleared
- Adaptive cruise or auto high beam unavailable
- Check engine light on some makes
Common causes of U0423
- Most likelyBattery, fuse or display disconnected so the cluster sends start values
- PossibleSoftware fault in cluster or receiving module
- Less likelyAnother node on the same bus disturbing the cluster's messages
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Instrument panel cluster control module
What each part of U0423 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 23 | The exact fault in that area. |
What to do next
- Note U0423 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0423
What does U0423 mean?
U0423 means "Invalid Data Received From Instrument Panel Cluster Control Module". The instrument cluster does more than display: it sends outside temperature, display and chime status or confirmations from its menus to other units. It is a generic code, so it means the same on every make.
Is it safe to drive with U0423?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will U0423 fail an emissions test?
Yes, it can. U0423 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0423 to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0423 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.