P0203
3 owner reports and 183 manufacturer filings across 36 model years from Cadillac, Chevrolet, GMC, Honda and others.
Where P0203 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Cadillac Escalade | Electrical System | 17 | — |
| 2021 Chevrolet Suburban | Electrical System | 12 | — |
| 2021 GMC Yukon | Engine And Engine Cooling | 12 | — |
| 2022 Cadillac Escalade | Engine And Engine Cooling | 10 | — |
| 2022 Chevrolet Suburban | Electrical System | 10 | — |
| 2022 GMC Yukon | Electrical System | 10 | — |
| 2023 GMC Yukon | Fuel/Propulsion System | 9 | — |
| 2021 Chevrolet Silverado | Electrical System | 7 | — |
| 2021 Chevrolet Tahoe | Electrical System | 7 | — |
| 2021 GMC Sierra | Electrical System | 7 | — |
| 2023 Cadillac Escalade | Electrical System | 6 | — |
| 2024 Chevrolet Suburban | Electrical System | 6 | — |
| 2022 Chevrolet Silverado | Electrical System | 5 | — |
| 2020 Chevrolet Silverado | Engine | 5 | — |
| 2022 Chevrolet Tahoe | Engine And Engine Cooling | 5 | — |
| 2022 GMC Sierra | Engine And Engine Cooling | 5 | — |
| 2020 GMC Sierra | Electrical System | 5 | — |
| 2024 Cadillac Escalade | Electrical System | 3 | — |
| 2024 Chevrolet Silverado | Fuel/Propulsion System | 3 | — |
| 2023 Chevrolet Silverado | Engine | 3 | — |
| 2023 Chevrolet Suburban | Fuel/Propulsion System | 3 | — |
| 2024 Chevrolet Tahoe | Electrical System | 3 | — |
| 2023 Chevrolet Tahoe | Electrical System | 3 | — |
| 2024 GMC Sierra | Electrical System | 3 | — |
| 2023 GMC Sierra | Fuel/Propulsion System | 3 | — |
| 2024 GMC Yukon | Fuel/Propulsion System | 3 | — |
| 2016 Mazda CX-5 | Engine | 3 | — |
| 2016 Mazda Mazda3 | Engine | 3 | — |
| 2016 Mazda Mazda6 | Engine | 3 | — |
| 2018 Volkswagen Tiguan | Fuel System, Other | 1 | 2 |
| 2019 Volkswagen Beetle | Fuel System, Other | 2 | — |
| 2018 Volkswagen Beetle | Fuel System, Other | 2 | — |
| 2018 Volkswagen Passat | Equipment | 2 | — |
| 2019 Honda Accord | Electrical System | — | 1 |
| 2017 Mazda CX-3 | Equipment | 1 | — |
| 2016 Mazda CX-3 | Equipment | 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.
Upon local investigation the error code P0203 and P0303 have populated as the most recent issue
Went for scan and it pulled up diagnostic code P0203 which is Replace Fuel injector wiring harness
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0203. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- PIE0791B2024-06-19 · Fuel/Propulsion System
- This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the Check Engine Lamp illuminated on DIC, and having DTCs P0202, P0203 Set.
- PIE0791A2024-06-05 · Electrical System
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Check Engine Lamp illuminated on Driver Information Center (DIC), and having DTCs P0202, P0203 Set.
- PIE07912024-05-30 · Electrical System
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Check Engine Lamp illuminated on Driver Information Center (DIC), and having DTC’s P0202, P0203 Set.
- TT 01-20-02_32023-10-19 · Fuel System, Other
- T8 fuel injector harness inspection for stored DTCs P0201, P0202, P0203, P0204.
- 22-NA-0872022-06-15 · Engine And Engine Cooling
- This technical bulletin provides a procedure to replace the fuel injector and the wiring harness to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with DTC P0201, P0202, P0203, P0204, P0205, P0206 and/or P0216 Set.
- 22-NA-0872022-05-19 · Electrical System
- This technical bulletin provides a procedure to replace the fuel injector and the wiring harness to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with DTC P0201, P0202, P0203, P0204, P0205, P0206 and/or P0216 Set.
What P0203 means
Source: SAE J2012 / OBD-IIP0203 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 P0203
Source: NHTSA files and the OBD-II standardCan I keep driving with P0203 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.