U0323
0 owner reports and 50 manufacturer filings across 23 model years from Mazda, Scion, Toyota.
Where U0323 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2016 Mazda CX-3 | Electrical System | 3 | — | Battery → |
| 2016 Mazda CX-5 | Tires | 3 | — | |
| 2016 Mazda CX-9 | Electrical System | 3 | — | Battery → |
| 2016 Mazda MX-5 | Electrical System | 3 | — | Battery → |
| 2016 Mazda Mazda3 | Electrical System | 3 | — | Battery → |
| 2016 Mazda Mazda6 | Electrical System | 3 | — | Battery → |
| 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 | — | Battery → |
| 2017 Mazda CX-5 | Electrical System | 2 | — | Battery → |
| 2019 Mazda CX-9 | Tires | 2 | — | |
| 2018 Mazda CX-9 | Electrical System | 2 | — | Battery → |
| 2017 Mazda CX-9 | Electrical System | 2 | — | Battery → |
| 2019 Mazda MX-5 | Electrical System | 2 | — | Battery → |
| 2018 Mazda MX-5 | Tires | 2 | — | |
| 2017 Mazda MX-5 | Electrical System | 2 | — | Battery → |
| 2018 Mazda Mazda3 | Electrical System | 2 | — | Battery → |
| 2017 Mazda Mazda3 | Tires | 2 | — | |
| 2018 Mazda Mazda6 | Tires | 2 | — | |
| 2017 Mazda Mazda6 | Tires | 2 | — | |
| 2016 Scion iA | Electrical System | 1 | — | Battery → |
| 2018 Toyota Yaris | Electrical System | 1 | — | Battery → |
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.
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U0323 by make
The same record, one make at a time: the model years, bulletins and owner reports that name U0323 on that maker’s vehicles.
What it gets filed under
50 manufacturer filings name U0323. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U0323.
- MT-010-18 Service bulletin2018-11-27 · 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-010-18 Service bulletin2018-11-27 · 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-0270-17 Service bulletin2017-08-14 · 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-0018-17 Service bulletin2017-08-14 · 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_1137 Service bulletin2016-11-03 · Equipment — Other — Owners/Service/Other Manual
- Mulri-Model (Equipped with Mazda connect) - DTC U0323/U0423/U3000 Cannot be deleted (Update)
What U0323 means
Source: SAE J2012 / OBD-IIU0323 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 U0323
Source: NHTSA files and the OBD-II standardCan I keep driving with U0323 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. 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.