U0423
2 owner reports and 55 manufacturer filings across 28 model years from Ford, Jeep, Mazda, Mercedes-Benz and others.
Where U0423 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2026 Jeep Grand Cherokee | Power Train | 3 | — |
| 2016 Mazda CX-3 | Electrical System | 3 | — |
| 2016 Mazda CX-5 | Tires | 3 | — |
| 2016 Mazda CX-9 | Electrical System | 3 | — |
| 2016 Mazda MX-5 | Electrical System | 3 | — |
| 2016 Mazda Mazda3 | Electrical System | 3 | — |
| 2016 Mazda Mazda6 | Electrical System | 3 | — |
| 2019 Mazda CX-3 | Tires | 2 | — |
| 2018 Mazda CX-3 | Tires | 2 | — |
| 2017 Mazda CX-3 | Tires | 2 | — |
| 2019 Mazda CX-5 | Electrical System | 2 | — |
| 2017 Mazda CX-5 | Electrical System | 2 | — |
| 2019 Mazda CX-9 | Electrical System | 2 | — |
| 2018 Mazda CX-9 | Tires | 2 | — |
| 2017 Mazda CX-9 | Tires | 2 | — |
| 2019 Mazda MX-5 | Tires | 2 | — |
| 2018 Mazda MX-5 | Tires | 2 | — |
| 2017 Mazda MX-5 | Tires | 2 | — |
| 2018 Mazda Mazda3 | Tires | 2 | — |
| 2017 Mazda Mazda3 | Electrical System | 2 | — |
| 2018 Mazda Mazda6 | Electrical System | 2 | — |
| 2017 Mazda Mazda6 | Electrical System | 2 | — |
| 2017 Ford Taurus | Electrical System | — | 1 |
| 2025 Jeep Grand Wagoneer | Power Train | 1 | — |
| 2025 Jeep Wagoneer | Power Train | 1 | — |
| 2017 Mercedes-Benz C-Class | Electrical System | — | 1 |
| 2016 Scion iA | Electrical System | 1 | — |
| 2018 Toyota Yaris | Electrical System | 1 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
I took the car to the dealer and they found fault codes - b11d8:14, u0423:82, u0415:00, u0028:08
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U0423. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 91006412025-08-05 · Power Train
- Symptoms/Condition: Shifter reports loss communication AND NO OTHER MODULES report the condition. Diagnostic: Please make sure ONLY shifter reports loss communication. If there are other modules reporting loss communication, then follow the existing service procedure Repair Procedure: 1. Verify Complaint - ESM reports a Loss of Communication (LOC) DTC, but no other modules do. - If multiple module
- MT-010-182018-11-27 · Electrical System
- Some vehicles (with MAZDA CONNECT) may exhibit a condition where DTC U0323(PCM) / U0423(ABS) /U3000(IC) CANNOT be deleted when the TPMS warning light flashes and/or the TCS/DSC indicator lights are illuminated. This can happen if the ignition is turned OFF within 20 seconds after the ignition is turned ON in one of the following two situations. 1. The ?ROOM? fuse (Engine compartment) is NOT instal
- MT-010-182018-11-27 · Tires — Pressure Monitoring And Regulating Systems
- Some vehicles (with MAZDA CONNECT) may exhibit a condition where DTC U0323(PCM) / U0423(ABS) /U3000(IC) CANNOT be deleted when the TPMS warning light flashes and/or the TCS/DSC indicator lights are illuminated. This can happen if the ignition is turned OFF within 20 seconds after the ignition is turned ON in one of the following two situations. 1. The ?ROOM? fuse (Engine compartment) is NOT instal
- T-SB-0270-172017-08-14 · Electrical System
- TSB: Some 2017 model year iA vehicles may exhibit Diagnostic Trouble Codes (DTCs) U0323 (PCM Software Incompatibility with Instrument Panel Control Module), U0423 (ABS Invalid Data Received from Instrument Panel Cluster Control Module), or U3000 (IC Control Module Internal Electronic Failure) if the vehicle?s battery or the multimedia display is disconnected. Follow the Repair Procedure in this bu
- S-SB-0018-172017-08-14 · Electrical System
- TSB: Some 2016 model year iA vehicles may exhibit Diagnostic Trouble Codes (DTCs) U0323 (PCM Software Incompatibility with Instrument Panel Control Module), U0423 (ABS Invalid Data Received from Instrument Panel Cluster Control Module), or U3000 (IC Control Module Internal Electronic Failure) if the vehicle?s battery or the multimedia display is disconnected. Follow the Repair Procedure in this bu
- MTI_11372016-11-03 · Equipment — Other — Owners/Service/Other Manual
- Mulri-Model (Equipped with Mazda connect) - DTC U0323/U0423/U3000 Cannot be deleted (Update)
What U0423 means
Source: SAE J2012 / OBD-IIU0423 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about U0423
Source: NHTSA files and the OBD-II standardCan I keep driving with U0423 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.